(Camilo vs David - David again narrowly escapes)
m (→‎Carlos (1038) vs Fabrice (1091))
 
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= PolaChess =
 
= PolaChess =
  
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The PolaChess tournament is the ongoing [[PolaFlow]] [[chess]] tournament. It is a [[Round-robin_tournament|Round-robin]], 10 minutes time, 0 increment tournament played during [[coffee]] time. Both a [[#PolÆlO|PolÆlO]] rating and [http://en.wikipedia.org/wiki/Chess_piece_relative_value centipawns] are computed. The person in charge is [[Carlos]].
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The PolaChess tournament was the [[PolaFlow]] [[chess]] tournament that we entertained while working as a funded scientific group at the {{uam}}. It was a [[Round-robin_tournament|Round-robin]], 15 minutes time, 0 increment tournament played during [[coffee]] time. Both a [[#PolÆlO|PolÆlO]] rating and [http://en.wikipedia.org/wiki/Chess_piece_relative_value centipawns] were computed. The person in charge was [[Juan Pablo]].
  
 
<center><wz tip="The first game of PolaChess. 19. Qe2+.">[[File:polachess-first-game.jpeg|650px]]</wz></center>
 
<center><wz tip="The first game of PolaChess. 19. Qe2+.">[[File:polachess-first-game.jpeg|650px]]</wz></center>
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</pgn>
 
</pgn>
  
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== Santiago (1000) vs Carlos (1031) ==
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== Carlos (1031) vs Santiago (1000) ==
  
 
<pgn>
 
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</pgn>
 
</pgn>
  
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== Santiago (987) vs Pablo (941) ==
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== Pablo (941) vs Santiago (987) ==
  
 
In a raging fury against our Colombian community, Santiago proceeds to calmly walk his way back up the ladder of the tournament, methodically resisting the attacks of White who, in their traditional style, succumb to their own pressure and split out to surrender their queen on an otherwise leading position. The ''shat queen'' moment&mdash;this move of the game where Juan Pablo becomes chess-blind and positions his dame in front of a pawn, bishop or right below the roofs of a knight&mdash;occurred here on the (Friday the) 13th move. It was then just a matter of carefully moving the heavy Black artillery left around, with little but enough time left to enforce checkmate. Playing with psychology on his side, Santiago allowed himself the occasional glance through the window, à la Bobby, which was a nice touch.
 
In a raging fury against our Colombian community, Santiago proceeds to calmly walk his way back up the ladder of the tournament, methodically resisting the attacks of White who, in their traditional style, succumb to their own pressure and split out to surrender their queen on an otherwise leading position. The ''shat queen'' moment&mdash;this move of the game where Juan Pablo becomes chess-blind and positions his dame in front of a pawn, bishop or right below the roofs of a knight&mdash;occurred here on the (Friday the) 13th move. It was then just a matter of carefully moving the heavy Black artillery left around, with little but enough time left to enforce checkmate. Playing with psychology on his side, Santiago allowed himself the occasional glance through the window, à la Bobby, which was a nice touch.
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== Camilo (966) vs David (999) ==
 
== Camilo (966) vs David (999) ==
  
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A game of tension, of tension going too far. First 10 moves or so have been slowly, carefully considered by both sides and getting the pot to almost boiling point. Then David blunders his queen away, 11. Bd3?? Even then, to strike mercilessly, Camilo took his time, and brought the heavy knight falling with all the weight of an actual horse on the square that meant defeat for our French contender. But there's nothing that you can do to vex David's attitude. He regarded this move as mere trifle, displaced his king and carried on with a face of steel. Time was still equal. But with time passing and nothing to loose, it was easy for Black to arrogantly pretend they could still play, and with the face of conquest, advance a minuscule little pawn towards recovering the wasted queen. White started to play faster (which is good) and with too much confidence (which is not), with some irrational fixation on delivering check. See 22. Qc4+?, letting the knight go away. At this point, or not too far, a girl who popped out of nowhere tried to get under the table to reach something below Camilo's bench. Upon inquiry, it turned out to be a coin that rolled all the way from the vending machine to our competitor. We had to pay the girl to get away. Too late. On 26th move, the blunder of the day changed the game's fate. In a mate-in-5 position, when everybody started to relax and think about the coin below the bench, Camilo spin out of control: first sacrifice of a bishop, 26. Bxa6+? then throwing the queen in its wake, 27 Qxa6+?? The move was stopped in mid-air, in a frozen time and space with only a resounding "too late, too late" from David, detonating in a cafetaria getting a moment's interest into an apparent scandal. Then in time trouble, psychologically ruined, pursuing illusory checkmates, only defeat could follow for White, who lost on time.
+
A game of tension, of tension going too far. First 10 moves or so have been slowly, carefully considered by both sides and getting the pot to almost boiling point. Then David blunders his queen away, 11. Bd3?? Even then, to strike mercilessly, Camilo took his time, and brought the heavy knight falling with all the weight of an actual horse on the square that meant defeat for our French contender. But there's nothing that you can do to vex David's attitude. He regarded this move as mere trifle, displaced his king and carried on with a face of steel. Time was still equal. But with time passing and nothing to loose, it was easy for Black to arrogantly pretend they could still play, and with the face of conquest, advance a minuscule little pawn towards recovering the wasted queen. White started to play faster (which is good) and with too much confidence (which is not), with some irrational fixation on delivering check. See 22. Qc4+?, letting the knight go away. At this point, or not too far, a girl who popped out of nowhere tried to get under the table to reach something below Camilo's bench. Upon inquiry, and thankfully, it turned out to be only for a coin that rolled all the way from the vending machine to our competitor. We had to pay the girl to go away. Too late. On 26th move, the blunder of the day changed the game's fate. In a mate-in-5 position, when everybody started to relax and think about the coin below the bench, Camilo spin out of control: first sacrifice of a bishop, 26. Bxa6+? then throwing the queen in its wake, 27 Qxa6+?? The move was stopped in mid-air, in a frozen time and space with only a resounding "too late, too late" from David, detonating in a cafetaria getting a moment's interest into an apparent scandal. Then in time trouble, psychologically ruined, pursuing illusory checkmates through pointless checks, only defeat could follow for White, who lost on time.
  
 
<pgn>
 
<pgn>
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1. e4 c5 2. Nc3 { Sicilian Defense, Closed Variation } d6 3. Nf3 e5 4. h3 Nc6 5. Bc4 Na5 6. b3 h5 7. g3 g6 8. Nh4 Qe7 9. Nd5 Qd7 10. Qf3 b5? { (0.25 → 2.00) Mistake. The best move was Nxc4. } (10... Nxc4 11. bxc4 b6 12. a4 Bb7 13. d3 Rc8 14. Kf1 Bxd5 15. cxd5 Be7 16. Bd2 Qd8 17. Kg2 Bxh4 18. gxh4 Qxh4 19. a5 Nf6 20. axb6) 11. Bd3? { (2.00 → 0.69) Mistake. The best move was Bxb5. } (11. Bxb5 Nc6 12. d3 Qb7 13. Bg5 Be6 14. Ba4 Bh6 15. Bf6 Rh7 16. c3 Qd7 17. b4 cxb4 18. Nxb4 Rc8 19. Nxc6 Rxc6 20. O-O Nxf6) 11... Ne7?? { (0.69 → 8.92) Blunder. The best move was Rb8. } (11... Rb8 12. a4 bxa4 13. Rxa4 Nc6 14. Bc4 Nd4 15. Qd1 Bg7 16. c3 Ne6 17. Qf3 Ng5 18. Qe3 Ne6 19. f4 Nc7 20. Nf3 Nxd5 21. exd5) 12. Nf6+ Kd8 13. Nxd7 Bxd7 14. Qf6? { (9.13 → 7.81) Mistake. The best move was Qxf7. } (14. Qxf7 Kc7 15. f4 Nac6 16. Bxb5 Be8 17. Qc4 a6 18. Bxc6 Nxc6 19. Bb2 Bg7 20. Nf3 Rf8 21. Ng5 Bd7 22. Nf7 Nb4 23. O-O-O Rac8) 14... Rh6? { (7.81 → 8.95) Mistake. The best move was Rg8. } (14... Rg8 15. a4 bxa4 16. Qxd6 Ke8 17. Qxe5 Bg7 18. Qxc5 Bxa1 19. Qxa5 Bf6 20. bxa4 Rb8 21. Bc4 Rc8 22. d3 Nc6 23. Qd5 Be6 24. Qb5) 15. Qxf7 Kc7 16. b4? { (9.17 → 8.03) Mistake. The best move was f4. } (16. f4 exf4 17. gxf4 Re8 18. a4 bxa4 19. Bb2 Nb7 20. e5 Nd8 21. Qc4 Nf5) 16... cxb4 17. a3?! { (8.03 → 7.24) Inaccuracy. The best move was Bxb5. } (17. Bxb5 Bxb5 18. d4 Rh8 19. dxe5 dxe5 20. Qf6 Rg8 21. Qxe5+ Kb6 22. Be3+ Ka6 23. c4) 17... g5 18. Nf5 Bxf5?? { (6.67 → 12.07) Blunder. The best move was Be6. } (18... Be6 19. Nxh6 Bxf7 20. Nxf7 b3 21. Rb1 Nec6 22. Nxg5 Be7 23. h4 bxc2 24. Rxb5 Rc8 25. Bxc2 Nd4 26. Rb2 Nc4 27. Ra2 Na5 28. d3) 19. exf5 b3 20. Bxb5 bxc2 21. d3 Nb3 22. Qc4+ Nc5 23. O-O?! { (10.38 → 9.16) Inaccuracy. The best move was Bxg5. } (23. Bxg5 Rb8 24. f6 Nc6 25. Qf7+ Nd7 26. Bxc6 Kxc6 27. Ra2 Rb1+ 28. Ke2 Rxh1) 23... Nxf5?! { (9.16 → 9.99) Inaccuracy. The best move was a6. } (23... a6 24. Ba4 Nxf5 25. Bxg5 Rh7 26. Bxc2 Nd4 27. f4 Nxc2 28. Qxc2 Rg7 29. Rab1 Kd7) 24. Bd2 a6 25. Ba5+ Kc8?! { (14.70 → Mate in 5) Checkmate is now unavoidable. The best move was Kb8. } (25... Kb8 26. Qf7 Be7 27. Bd7 Ka7 28. Bxf5 Rb8 29. Qxe7+ Rb7 30. Qxg5 Rh8) 26. Bxa6+? { (Mate in 5 → 8.41) Lost forced checkmate sequence. The best move was Qf7. } (26. Qf7 Ne7 27. Qxf8+ Kb7 28. Qxe7+ Nd7 29. Qxd7+ Kb8 30. Qc7#) 26... Rxa6 27. Qxa6+?? { (8.32 → -2.74) Blunder. The best move was Qf7. } (27. Qf7 Rxa5 28. Qxf8+ Kc7 29. Qxf5 Ne6 30. Qf7+ Kb6 31. a4 Ra7 32. a5+ Rxa5 33. Qe7 Rxa1 34. Qxd6+ Kb5) 27... Nxa6 28. Rac1 Nd4 29. Bc3? { (-3.21 → -4.85) Mistake. The best move was Rxc2+. } (29. Rxc2+ Nxc2 30. Rc1 Nc5 31. Rxc2 Kd7 32. Rc3 Bg7 33. Rc1 Rf6 34. Bb6 Kc6 35. Bd8 Rf3 36. a4 Rxd3 37. Bxg5 Kd5 38. a5 e4) 29... Nc5?? { (-4.85 → -1.00) Blunder. The best move was Ne2+. } (29... Ne2+ 30. Kg2 Nxc1 31. Rxc1 d5 32. Bxe5 Rc6 33. Bb2 g4 34. hxg4 hxg4 35. d4 Bh6 36. Rh1 c1=B 37. Bxc1 Bxc1 38. Rh8+ Kb7 39. Rh4) 30. Rfe1?? { (-1.00 → -4.26) Blunder. The best move was Bxd4. } (30. Bxd4 exd4 31. Rxc2 Kd7 32. a4 Bg7 33. a5 Nxd3 34. a6 Rh8 35. Ra2 Ra8 36. a7 Nc5 37. f4 gxf4 38. Kg2 Kc6 39. gxf4 d3) 30... Nxd3 31. Rxc2?? { (-4.32 → -8.34) Blunder. The best move was Bxd4. } (31. Bxd4 Nxe1 32. Kf1 exd4 33. Kxe1 h4 34. Rxc2+ Kd7 35. g4 Rf6 36. Ke2 d5 37. a4 d3+ 38. Kxd3 Rf3+ 39. Ke2 Rxh3 40. Ra2 Bc5) 31... Nxe1 32. Rb2 Ndf3+?! { (-8.44 → -7.48) Inaccuracy. The best move was Nef3+. } (32... Nef3+ 33. Kg2 d5 34. a4 Rc6 35. Bxd4 Nxd4 36. Ra2 Ra6 37. f3 Bb4 38. Ra1 Kd7 39. Ra2) 33. Kh1? { (-7.48 → -8.77) Mistake. The best move was Kf1. } (33. Kf1 Nd3 34. Rb5 e4 35. Ra5 Be7 36. Ke2 Bf6 37. Bxf6 Rxf6 38. Ke3 Nfe5 39. Kxe4 Nxf2+ 40. Kd5 Rf3 41. Ra6 Rd3+ 42. Ke6 Ne4) 33... e4?! { (-8.77 → -7.91) Inaccuracy. The best move was Nd3. } (33... Nd3 34. Rc2 Kb7 35. Bb4 Nxb4 36. axb4 d5 37. Rb2 e4 38. Rb1 Rb6 39. b5 Nd4 40. Kg2 Bc5 41. g4 h4 42. Ra1 Rxb5 43. Rc1) 34. Rb6?! { (-7.91 → -8.73) Inaccuracy. The best move was Bxe1. } (34. Bxe1 Nxe1 35. Re2 Nd3 36. f3 d5 37. fxe4 dxe4 38. Kg1 Re6 39. a4 Kd7 40. Ra2) 34... g4 35. Rc6+? { (-8.73 → -14.69) Mistake. The best move was Bxe1. } (35. Bxe1 Nxe1 36. Rb5 Bg7 37. Kh2 Bd4 38. Rf5 Nf3+ 39. Kg2 gxh3+ 40. Kxh3 Bxf2 41. Kg2 Bd4 42. Rf4 d5 43. Rf5 Be5 44. Kf2 Kd7) 35... Kd7 36. Ra6 gxh3 37. Ba5 Ke7 38. Ra8 Bg7?! { (-21.45 → -9.34) Inaccuracy. The best move was Nd3. } (38... Nd3 39. Ra7+ Ke6 40. Bb6 d5 41. a4 d4 42. Bxd4 Nxd4 43. Ra6+ Bd6 44. Kh2 Nxf2 45. Kg1 e3 46. a5) 39. Bd8+?! { (-9.34 → -18.72) Inaccuracy. The best move was Bxe1. } (39. Bxe1 Nxe1 40. Ra4 d5 41. Ra7+ Kf8 42. Ra8+ Kf7 43. Ra7+ Kg6 44. Kh2 Nd3 45. Kxh3 Nxf2+ 46. Kg2 Ng4 47. a4 Be5 48. Ra8 Kf5) 39... Ke6 40. Ra7?! { (-16.50 → Mate in 13) Checkmate is now unavoidable. The best move was Bb6. } (40. Bb6 Nd3 41. Rc8 d5 42. Rc2 Kf5 43. Be3 Ra6 44. Rd2 Nxd2 45. Bxd2 Nxf2+ 46. Kg1 Ng4 47. Bb4 Bd4+ 48. Kf1 Bf2 49. Be7 Bxg3) 40... Bd4 41. Re7+ Kd5 { White resigns } 0-1
 
1. e4 c5 2. Nc3 { Sicilian Defense, Closed Variation } d6 3. Nf3 e5 4. h3 Nc6 5. Bc4 Na5 6. b3 h5 7. g3 g6 8. Nh4 Qe7 9. Nd5 Qd7 10. Qf3 b5? { (0.25 → 2.00) Mistake. The best move was Nxc4. } (10... Nxc4 11. bxc4 b6 12. a4 Bb7 13. d3 Rc8 14. Kf1 Bxd5 15. cxd5 Be7 16. Bd2 Qd8 17. Kg2 Bxh4 18. gxh4 Qxh4 19. a5 Nf6 20. axb6) 11. Bd3? { (2.00 → 0.69) Mistake. The best move was Bxb5. } (11. Bxb5 Nc6 12. d3 Qb7 13. Bg5 Be6 14. Ba4 Bh6 15. Bf6 Rh7 16. c3 Qd7 17. b4 cxb4 18. Nxb4 Rc8 19. Nxc6 Rxc6 20. O-O Nxf6) 11... Ne7?? { (0.69 → 8.92) Blunder. The best move was Rb8. } (11... Rb8 12. a4 bxa4 13. Rxa4 Nc6 14. Bc4 Nd4 15. Qd1 Bg7 16. c3 Ne6 17. Qf3 Ng5 18. Qe3 Ne6 19. f4 Nc7 20. Nf3 Nxd5 21. exd5) 12. Nf6+ Kd8 13. Nxd7 Bxd7 14. Qf6? { (9.13 → 7.81) Mistake. The best move was Qxf7. } (14. Qxf7 Kc7 15. f4 Nac6 16. Bxb5 Be8 17. Qc4 a6 18. Bxc6 Nxc6 19. Bb2 Bg7 20. Nf3 Rf8 21. Ng5 Bd7 22. Nf7 Nb4 23. O-O-O Rac8) 14... Rh6? { (7.81 → 8.95) Mistake. The best move was Rg8. } (14... Rg8 15. a4 bxa4 16. Qxd6 Ke8 17. Qxe5 Bg7 18. Qxc5 Bxa1 19. Qxa5 Bf6 20. bxa4 Rb8 21. Bc4 Rc8 22. d3 Nc6 23. Qd5 Be6 24. Qb5) 15. Qxf7 Kc7 16. b4? { (9.17 → 8.03) Mistake. The best move was f4. } (16. f4 exf4 17. gxf4 Re8 18. a4 bxa4 19. Bb2 Nb7 20. e5 Nd8 21. Qc4 Nf5) 16... cxb4 17. a3?! { (8.03 → 7.24) Inaccuracy. The best move was Bxb5. } (17. Bxb5 Bxb5 18. d4 Rh8 19. dxe5 dxe5 20. Qf6 Rg8 21. Qxe5+ Kb6 22. Be3+ Ka6 23. c4) 17... g5 18. Nf5 Bxf5?? { (6.67 → 12.07) Blunder. The best move was Be6. } (18... Be6 19. Nxh6 Bxf7 20. Nxf7 b3 21. Rb1 Nec6 22. Nxg5 Be7 23. h4 bxc2 24. Rxb5 Rc8 25. Bxc2 Nd4 26. Rb2 Nc4 27. Ra2 Na5 28. d3) 19. exf5 b3 20. Bxb5 bxc2 21. d3 Nb3 22. Qc4+ Nc5 23. O-O?! { (10.38 → 9.16) Inaccuracy. The best move was Bxg5. } (23. Bxg5 Rb8 24. f6 Nc6 25. Qf7+ Nd7 26. Bxc6 Kxc6 27. Ra2 Rb1+ 28. Ke2 Rxh1) 23... Nxf5?! { (9.16 → 9.99) Inaccuracy. The best move was a6. } (23... a6 24. Ba4 Nxf5 25. Bxg5 Rh7 26. Bxc2 Nd4 27. f4 Nxc2 28. Qxc2 Rg7 29. Rab1 Kd7) 24. Bd2 a6 25. Ba5+ Kc8?! { (14.70 → Mate in 5) Checkmate is now unavoidable. The best move was Kb8. } (25... Kb8 26. Qf7 Be7 27. Bd7 Ka7 28. Bxf5 Rb8 29. Qxe7+ Rb7 30. Qxg5 Rh8) 26. Bxa6+? { (Mate in 5 → 8.41) Lost forced checkmate sequence. The best move was Qf7. } (26. Qf7 Ne7 27. Qxf8+ Kb7 28. Qxe7+ Nd7 29. Qxd7+ Kb8 30. Qc7#) 26... Rxa6 27. Qxa6+?? { (8.32 → -2.74) Blunder. The best move was Qf7. } (27. Qf7 Rxa5 28. Qxf8+ Kc7 29. Qxf5 Ne6 30. Qf7+ Kb6 31. a4 Ra7 32. a5+ Rxa5 33. Qe7 Rxa1 34. Qxd6+ Kb5) 27... Nxa6 28. Rac1 Nd4 29. Bc3? { (-3.21 → -4.85) Mistake. The best move was Rxc2+. } (29. Rxc2+ Nxc2 30. Rc1 Nc5 31. Rxc2 Kd7 32. Rc3 Bg7 33. Rc1 Rf6 34. Bb6 Kc6 35. Bd8 Rf3 36. a4 Rxd3 37. Bxg5 Kd5 38. a5 e4) 29... Nc5?? { (-4.85 → -1.00) Blunder. The best move was Ne2+. } (29... Ne2+ 30. Kg2 Nxc1 31. Rxc1 d5 32. Bxe5 Rc6 33. Bb2 g4 34. hxg4 hxg4 35. d4 Bh6 36. Rh1 c1=B 37. Bxc1 Bxc1 38. Rh8+ Kb7 39. Rh4) 30. Rfe1?? { (-1.00 → -4.26) Blunder. The best move was Bxd4. } (30. Bxd4 exd4 31. Rxc2 Kd7 32. a4 Bg7 33. a5 Nxd3 34. a6 Rh8 35. Ra2 Ra8 36. a7 Nc5 37. f4 gxf4 38. Kg2 Kc6 39. gxf4 d3) 30... Nxd3 31. Rxc2?? { (-4.32 → -8.34) Blunder. The best move was Bxd4. } (31. Bxd4 Nxe1 32. Kf1 exd4 33. Kxe1 h4 34. Rxc2+ Kd7 35. g4 Rf6 36. Ke2 d5 37. a4 d3+ 38. Kxd3 Rf3+ 39. Ke2 Rxh3 40. Ra2 Bc5) 31... Nxe1 32. Rb2 Ndf3+?! { (-8.44 → -7.48) Inaccuracy. The best move was Nef3+. } (32... Nef3+ 33. Kg2 d5 34. a4 Rc6 35. Bxd4 Nxd4 36. Ra2 Ra6 37. f3 Bb4 38. Ra1 Kd7 39. Ra2) 33. Kh1? { (-7.48 → -8.77) Mistake. The best move was Kf1. } (33. Kf1 Nd3 34. Rb5 e4 35. Ra5 Be7 36. Ke2 Bf6 37. Bxf6 Rxf6 38. Ke3 Nfe5 39. Kxe4 Nxf2+ 40. Kd5 Rf3 41. Ra6 Rd3+ 42. Ke6 Ne4) 33... e4?! { (-8.77 → -7.91) Inaccuracy. The best move was Nd3. } (33... Nd3 34. Rc2 Kb7 35. Bb4 Nxb4 36. axb4 d5 37. Rb2 e4 38. Rb1 Rb6 39. b5 Nd4 40. Kg2 Bc5 41. g4 h4 42. Ra1 Rxb5 43. Rc1) 34. Rb6?! { (-7.91 → -8.73) Inaccuracy. The best move was Bxe1. } (34. Bxe1 Nxe1 35. Re2 Nd3 36. f3 d5 37. fxe4 dxe4 38. Kg1 Re6 39. a4 Kd7 40. Ra2) 34... g4 35. Rc6+? { (-8.73 → -14.69) Mistake. The best move was Bxe1. } (35. Bxe1 Nxe1 36. Rb5 Bg7 37. Kh2 Bd4 38. Rf5 Nf3+ 39. Kg2 gxh3+ 40. Kxh3 Bxf2 41. Kg2 Bd4 42. Rf4 d5 43. Rf5 Be5 44. Kf2 Kd7) 35... Kd7 36. Ra6 gxh3 37. Ba5 Ke7 38. Ra8 Bg7?! { (-21.45 → -9.34) Inaccuracy. The best move was Nd3. } (38... Nd3 39. Ra7+ Ke6 40. Bb6 d5 41. a4 d4 42. Bxd4 Nxd4 43. Ra6+ Bd6 44. Kh2 Nxf2 45. Kg1 e3 46. a5) 39. Bd8+?! { (-9.34 → -18.72) Inaccuracy. The best move was Bxe1. } (39. Bxe1 Nxe1 40. Ra4 d5 41. Ra7+ Kf8 42. Ra8+ Kf7 43. Ra7+ Kg6 44. Kh2 Nd3 45. Kxh3 Nxf2+ 46. Kg2 Ng4 47. a4 Be5 48. Ra8 Kf5) 39... Ke6 40. Ra7?! { (-16.50 → Mate in 13) Checkmate is now unavoidable. The best move was Bb6. } (40. Bb6 Nd3 41. Rc8 d5 42. Rc2 Kf5 43. Be3 Ra6 44. Rd2 Nxd2 45. Bxd2 Nxf2+ 46. Kg1 Ng4 47. Bb4 Bd4+ 48. Kf1 Bf2 49. Be7 Bxg3) 40... Bd4 41. Re7+ Kd5 { White resigns } 0-1
 
</pgn>
 
</pgn>
 +
 +
== Fabrice (1089) vs Javier (1000) ==
 +
 +
We have a new player, Javier, also the strongest one (playing in a club), so this is great news for our competition. Javier enters with the provisional rating rules, so his rating changes a lot, sinking to 964 as he lost the game, while Fabrice's (yours truly, writing this comment) changes little, winning only 2 points in what was the most difficult game so far. Actually the game was a win for Black, who had a mate position in move 31. Qg4# Chess being a game where a single mistake can overturn everything, since 31. g6+?? was played instead, a Berezina was turned into a Campo Formio. A mate had been announced, and as I had seen the mate with queen, I accepted the claim as valid, but the Referee (Pablo) observed this was not checkmate, so the game carried on, and after forcing the exchange of queens, Black was in the mental despair situation and did not try to fight against the rook. A careless knight move led to his capture on discovering a check, and Black resigned. This is a victory from a lost game. But aren't many victories like that? (especially when involving French players?) Like this, everybody's a winner: the good chess player, who loses on a blunder and the loser, who wins as a patzer. To make things worst, on move 15. a super-castling 15. O-O-O-O was attempted, conveniently getting the king on d1, but of course the referee objected, and everybody laughed his ass off, not letting me add another quantum move up my sleeve of illegal tricks. Still, the game continued.
 +
 +
The main feature of the game as far as I am concerned is my move 7. c3?? which the audience took for what it was: a blunder, but assuming a stupid oversight, while it was really a gambit. Which one? This is the variation I had in mind (you can play it in the game below as the 2nd variation):
 +
 +
:7. Nh2 h6xg5 (opening the column)
 +
:8. h4xg5 (menacing to take back the sacrificed piece)
 +
 +
The knight has ultimately to move, leaving the Black king naked to an attack from the White queen supported by the king's bishop, and pinned by the White king's bishop. This leads to aggressive attack that, in time battle, may be worth the small loss in material. I'm fairly sure in the queenside castle of Black, this provides an actual advantage (my experience is that strong players tend to reject this gambit). Here, though, the knight was in the way, Javier is a good player, so he had time to develop his pieces to turn this hurried and lame attack into a sound counter-attack. In fact, even if I hadn't ''shat'' the horse in the middle, this was a mistake, since, so the computer analyzes:
 +
 +
:8. ... d5 (exchanging knight for bishop)
 +
:9. Bb3 (holding the pin) Nh7 (keeping the knight)
 +
:10. g6
 +
 +
The queen still looks dangerous but the analysis shows that it's still better for Black.
 +
 +
<pgn>
 +
[Event "Casual game"]
 +
[Site "http://lichess.org/JWRKY56p"]
 +
[Date "2015.03.13"]
 +
[White "Fabrice"]
 +
[Black "Javier"]
 +
[Result "1-0"]
 +
[WhiteElo "?"]
 +
[BlackElo "?"]
 +
[PlyCount "71"]
 +
[Variant "Standard"]
 +
[TimeControl "15-0"]
 +
[ECO "C55"]
 +
[Opening "Italian Game, Two Knights Defense, Modern Bishop's Opening"]
 +
[Annotator "lichess.org+Fabrice variation"]
 +
 +
1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 { Italian Game, Two Knights Defense, Modern Bishop's Opening } Bc5 5. Bg5 O-O 6. h4 h6 7. c3? { (-0.52 → -2.58) Mistake. The best move was Bxf6. } (7. Bxf6 Qxf6 8. Nc3 Ne7 9. Na4 Bd6 10. Nc3 c6 11. Bb3 Bc5 12. Na4 Bb4+ 13. c3 Ba5 14. d4 d6 15. O-O exd4 16. Qxd4) {Fabrice: What I had in mind} (7. Nh2 h6xg5 8. h4xg5 d5 9. Bb3 Nh7 10. g6) 7... hxg5 8. hxg5 Ng4 9. Qd2? { (-2.39 → -4.50) Mistake. The best move was d4. } (9. d4 exd4 10. g6 Qf6 11. gxf7+ Rxf7 12. O-O d6 13. Qb3 Nge5 14. Bxf7+ Nxf7 15. a4 d3 16. Nbd2 Qh6 17. Rad1) 9... Bxf2+ 10. Kf1 Be3 11. Qe2 d6?! { (-4.51 → -3.52) Inaccuracy. The best move was Bxg5. } (11... Bxg5 12. Nxg5 Qxg5 13. Qd2 Qxd2 14. Nxd2 Ne3+ 15. Kg1 Nxc4 16. Nxc4 d6 17. Ne3 Be6 18. g4 g6 19. Kf2 Kg7 20. a4 f6 21. b4) 12. Nfd2? { (-3.52 → -6.33) Mistake. The best move was g6. } (12. g6 Qf6 13. gxf7+ Rxf7 14. Bxf7+ Qxf7 15. Nd2 Be6 16. Ke1 b5 17. Kd1 Bh6 18. a3 Rf8 19. Kc2 Ne3+ 20. Kb1 Qg6 21. Nh4 Qg3) 12... Be6? { (-6.33 → -4.64) Mistake. The best move was Qxg5. } (12... Qxg5 13. Nf3 Qf4 14. Na3 Bb6 15. Nc2 Be6 16. Rh3 Bxc4 17. g3 Bxd3 18. Qxd3 Qf6 19. Qe2 Rad8 20. Rh4 Qg6 21. Kg2 f5 22. exf5) 13. Qf3? { (-4.64 → -6.16) Mistake. The best move was Rh4. } (13. Rh4 Bxd2 14. Nxd2 Qxg5 15. Nf3 Qf4 16. Bb3 Bxb3 17. axb3 f5 18. Kg1 a6 19. Re1 Rf6 20. exf5 Rxf5 21. Qe4 Qxe4 22. dxe4 Rf4) 13... Bxd2? { (-6.16 → -4.80) Mistake. The best move was Bxg5. } (13... Bxg5 14. a4 Bh6 15. Kg1 Qg5 16. Rh3 Bxc4 17. Nxc4 Qc1+ 18. Qf1 Qxf1+ 19. Kxf1 f5 20. exf5 Rxf5+ 21. Ke1 d5 22. Rf3 Rxf3 23. gxf3) 14. Nxd2 Qxg5 15. Re1?? { (-4.70 → -9.04) Blunder. The best move was Ke2. } (15. Ke2 Ne3 16. Qxe3 Qxg2+ 17. Qf2 Nd4+ 18. cxd4 Bg4+ 19. Ke1 Qxh1+ 20. Nf1 exd4 21. Kd2 b5 22. Bb3 a5 23. Bd1 Be6 24. Nh2 d5) 15... Bxc4?? { (-9.04 → -4.97) Blunder. The best move was Qxd2. } (15... Qxd2 16. Qe2 Qf4+ 17. Kg1 Bxc4 18. dxc4 f5 19. Rh5 Ne7 20. exf5 Nxf5 21. Qf3 Nfe3 22. Qxf4 Rxf4 23. Rh3 Nxc4) 16. Nxc4 f5 17. Qh3 fxe4+ 18. Kg1 Nh6?! { (-5.79 → -5.17) Inaccuracy. The best move was exd3. } (18... exd3 19. Qxd3 Qf5 20. Qxf5 Rxf5 21. Rh4 Nf6 22. g3 Nd5 23. Re2 Raf8 24. Nd2) 19. Rxe4 Rf4 20. Re3? { (-4.97 → -6.10) Mistake. The best move was Qh5. } (20. Qh5 Qxh5 21. Rxh5 Rxe4 22. dxe4 Ng4 23. Rg5 Nf6 24. Nd2 Kf7 25. Rg3 Rh8 26. Rh3 Rxh3 27. gxh3 Nd8 28. Kf2 Ne6 29. Ke3) 20... Raf8 21. Rg3 Rf1+ 22. Kh2 Rxh1+ 23. Kxh1 Qc1+ 24. Kh2 Rf1 25. Qe6+ Nf7 26. Qe8+? { (-8.41 → -12.96) Mistake. The best move was Rf3. } (26. Rf3 Rh1+ 27. Kg3 Nd8 28. Qg4 Qe1+ 29. Rf2 d5 30. Na3 Qe3+ 31. Rf3 Qh6 32. Rxf7 Kxf7 33. Qd7+ Kg6 34. Qg4+ Kh7 35. Nc2 Ne6) 26... Kh7 27. Rh3+ Nh6 28. Ne3?! { (-12.96 → Mate in 4) Checkmate is now unavoidable. The best move was Nd2. } (28. Nd2 Rh1+ 29. Kg3 Qe1+ 30. Kf3 Rxh3+ 31. gxh3 Qxd2 32. a4 Qxd3+ 33. Kg2 Qc2+ 34. Kf1 Qxb2 35. Qf8 Qb1+ 36. Kg2 Nf5 37. Qf7 Qe4+) 28... Rh1+ 29. Kg3 Qxe3+ 30. Kh4 Qf4+ 31. Kh5 g6+?? { (Mate in 1 → -1.24) Lost forced checkmate sequence. The best move was Qg4#. } (31... Qg4#) 32. Qxg6+ Kh8 33. Rxh1 Ne7?? { (-1.24 → 3.18) Blunder. The best move was Nf5. } (33... Nf5 34. Qf6+ Kg8 35. Qg5+ Qxg5+ 36. Kxg5 Ne3 37. g3 Kg7 38. Re1 Nd5 39. Kf5 Nb6 40. Rd1 Na4 41. d4 exd4 42. cxd4 Nxb2 43. Rb1) 34. Qxh6+ Qxh6+ 35. Kxh6 Nf5+?? { (3.09 → 9.49) Blunder. The best move was Kg8. } (35... Kg8 36. g4 a6 37. g5 Nf5+ 38. Kg6 Ne7+ 39. Kf6 Nd5+ 40. Kf5 Kg7 41. c4 Ne7+ 42. Ke6 Ng6 43. Kd7 Nf4 44. Rd1 Kg6 45. Kxc7) 36. Kg5+ { Black resigns } 1-0
 +
</pgn>
 +
 +
== Stefan (1005) vs Amir (1000) ==
 +
 +
Another new player, [[Amir Rahmani]], joined the tournament to defend the colors of Isfahan against Stefan who took a bye from our club player till Wednesday. A strange opening and a dangerous unconvering of the king-side let Stefan, who was mentally and physically preparing himself to destroy Javier, have an easy win. Tomorrow, Amir vs Juan Pablo. Bets are opened. Will the "[http://goo.gl/zuLRwS shat queen]" get in the way of another assured victory? Or will Amir toy again with [http://en.wikipedia.org/wiki/Irregular_chess_opening irregular openings]?
 +
 +
<pgn>
 +
[Event "Casual game"]
 +
[Site "http://lichess.org/l512MF3w"]
 +
[Date "2015.03.16"]
 +
[White "Stefan"]
 +
[Black "Amir"]
 +
[Result "1-0"]
 +
[WhiteElo "?"]
 +
[BlackElo "?"]
 +
[PlyCount "27"]
 +
[Variant "Standard"]
 +
[TimeControl "-"]
 +
[ECO "B10"]
 +
[Opening "Caro-Kann Defense, General"]
 +
[Annotator "lichess.org"]
 +
 +
1. e4 c6 { Caro-Kann Defense, General } 2. d4 f6?! { (0.44 → 1.33) Inaccuracy. The best move was d5. } (2... d5 3. e5 Bf5 4. Nf3 e6 5. Be2 Nd7 6. O-O) 3. Nc3 Nh6? { (1.25 → 4.12) Mistake. The best move was d6. } (3... d6 4. Nf3 e5 5. Bc4 b5 6. Bb3 Qc7 7. O-O Ne7 8. dxe5 dxe5 9. Be3 Nd7 10. a4) 4. Nh3?? { (4.12 → 0.80) Blunder. The best move was Bxh6. } (4. Bxh6 d5 5. Bf4 dxe4 6. Nxe4 Bf5 7. Qe2 e6 8. O-O-O Na6 9. g4 Bg6 10. Nf3 Nb4 11. Nc5 Qd5 12. Nxe6 Nxa2+ 13. Kb1) 4... e6? { (0.80 → 2.49) Mistake. The best move was Nf7. } (4... Nf7 5. Be2 e6 6. O-O d5 7. Nf4 e5 8. Nh5 g6 9. dxe5 gxh5 10. exd5 fxe5) 5. Bd3? { (2.49 → 0.85) Mistake. The best move was Bxh6. } (5. Bxh6 gxh6 6. Qh5+ Ke7 7. O-O-O Bg7 8. e5 d5 9. exd6+ Qxd6 10. Kb1 Kf8 11. g3 Qe7 12. Nf4 Qe8 13. Qh4 Qe7 14. Bh3 f5) 5... Bd6?? { (0.85 → 4.24) Blunder. The best move was Nf7. } (5... Nf7 6. O-O Na6 7. Be3 Be7 8. f4 O-O 9. Nf2 b5 10. e5 f5 11. a4 bxa4 12. Be2 Nb4 13. Rxa4 Bb7) 6. Bxh6 gxh6 7. Qh5+ Ke7?! { (3.75 → 4.45) Inaccuracy. The best move was Kf8. } (7... Kf8 8. e5 Be7 9. O-O-O d5 10. exd6 Bxd6 11. Ne4 Kg7 12. Be2 Qe7 13. Rd3 Rf8 14. Nxd6 Qxd6 15. Rg3+ Kh8 16. Qxh6 Rf7) 8. Qxh6? { (4.45 → 1.90) Mistake. The best move was e5. } (8. e5 fxe5 9. dxe5 Bc7 10. Ne4 Qf8 11. Qh4+ Ke8 12. Nf6+ Kf7 13. f4 Bd8 14. Qh5+ Ke7 15. O-O-O Ba5 16. Qh4 Kd8 17. Nd5+ Ke8) 8... Qg8? { (1.90 → 4.48) Mistake. The best move was Qf8. } (8... Qf8 9. Qe3 Kd8 10. O-O-O a5 11. e5 Be7 12. exf6 Bxf6 13. Ne4 Be7 14. Kb1 Na6 15. Nf4 b5 16. c3 Nc7) 9. g3? { (4.48 → 2.07) Mistake. The best move was e5. } (9. e5 Bb4 10. exf6+ Kd8 11. Ng5 Qf8 12. Qxf8+ Rxf8 13. Nxh7 Rh8 14. a3 Bxc3+ 15. bxc3 d5 16. Kd2 Nd7 17. Rae1) 9... f5? { (2.07 → 5.06) Mistake. The best move was e5. } (9... e5 10. O-O Qf8 11. Qd2 exd4 12. Ne2 c5 13. Nhf4 b6 14. Nd5+ Ke8 15. Nef4 Bb7 16. c3 Nc6 17. Be2 Rc8 18. Bh5+ Kd8) 10. e5? { (5.06 → 3.60) Mistake. The best move was Qh4+. } (10. Qh4+ Kf7 11. exf5 Be7 12. Qf4 d5 13. O-O Qf8 14. fxe6+ Kg8 15. Qe3 Na6 16. a3 h5 17. Nf4) 10... Bb4 11. O-O? { (3.34 → 2.33) Mistake. The best move was g4. } (11. g4 Kd8 12. gxf5 Qf8 13. Qxf8+ Rxf8 14. f6 d6 15. O-O-O dxe5 16. dxe5 Nd7 17. Bxh7 Bxc3) 11... c5?? { (2.33 → 8.24) Blunder. The best move was Kd8. } (11... Kd8 12. Ne2 Be7 13. c4 b6 14. a3 Kc7 15. Qe3 h5 16. Nhf4 h4) 12. Nb5 Nc6? { (8.21 → Mate in 2) Checkmate is now unavoidable. The best move was Ke8. } (12... Ke8 13. Qh4 d5 14. exd6 Qg7 15. Nc7+ Kd7 16. dxc5 Bxc5 17. Bb5+ Nc6 18. Nxa8 a6 19. Bxc6+ Kxc6 20. b4 Qd4 21. bxc5 Qxh4 22. gxh4) 13. Qf6+ Ke8 14. Nc7# { Black is checkmated } 1-0
 +
</pgn>
 +
 +
== Amir (953) vs Juan Pablo (927) ==
 +
 +
A late PolaChess session today, since Amir was looking for his new place to live (which he found, by the way). Everybody was expecting a bold queen sacrifice from Juan Pablo, which, not disappointingly, duly came on precisely the traditional 12th move. We let you discover this fantastic queen blunder of majestic proportion which, as it should to have all its savor, was played on a strong, if not winning, position.
 +
 +
<center><wz tip="Don't touch the queen! Don't touch the queen!">[[File:polachess-17March2015.jpeg|400px]]</wz></center>
 +
 +
<pgn>
 +
[Event "Casual game"]
 +
[Site "http://lichess.org/YeZ9kpDn"]
 +
[Date "2015.03.17"]
 +
[White "Amir"]
 +
[Black "Pablo"]
 +
[Result "1-0"]
 +
[WhiteElo "?"]
 +
[BlackElo "?"]
 +
[PlyCount "25"]
 +
[Variant "Standard"]
 +
[TimeControl "-"]
 +
[ECO "C20"]
 +
[Opening "King Pawn Game, General"]
 +
[Annotator "lichess.org"]
 +
 +
1. e4 e5 { King Pawn Game, General } 2. g3 Nf6 3. Bd3?! { (-0.18 → -1.05) Inaccuracy. The best move was Nc3. } (3. Nc3 Bc5 4. f4 d6 5. fxe5 dxe5 6. Nf3 Bg4) 3... d5 4. exd5 Nxd5 5. Bb5+?! { (-0.57 → -1.16) Inaccuracy. The best move was Nc3. } (5. Nc3 Be7 6. Be4 c6 7. d4 exd4 8. Nxd5 cxd5 9. Bg2 Nc6 10. Ne2 O-O 11. O-O Bg4 12. h3 Be6 13. Nxd4 Qb6 14. Nxe6 fxe6) 5... c6 6. Bd3 Bc5 7. Qh5?! { (-1.06 → -1.58) Inaccuracy. The best move was Nc3. } (7. Nc3 Nb4 8. Be4 Qd4 9. Qe2 f5 10. a3 fxe4 11. axb4 Bxb4 12. f3 O-O) 7... Nf6?! { (-1.58 → -0.71) Inaccuracy. The best move was Be6. } (7... Be6 8. Nc3 Nd7 9. Nf3 g6 10. Qg5 Nb4 11. Qxd8+ Rxd8 12. Be4 Bd5 13. Kd1 Bxf2) 8. Qxe5+ Be7 9. Qg5?! { (-0.60 → -1.48) Inaccuracy. The best move was Nc3. } (9. Nc3 Nbd7 10. Qf4 Nc5 11. Bc4 Ne6 12. Bxe6 Bxe6 13. Nge2 Bh3 14. Rg1 O-O 15. d3 Re8 16. Be3 Bd6 17. Qd4 Bg4 18. O-O-O) 9... O-O 10. Nf3? { (-1.51 → -2.82) Mistake. The best move was Ne2. } (10. Ne2 Nbd7 11. Nbc3 Nd5 12. Qg4 Nb4 13. Qe4 Nf6 14. Qg2 Nxd3+ 15. cxd3 Re8 16. O-O Bf5 17. d4 Bb4 18. f3 Bd3 19. Rf2 Qe7) 10... Na6? { (-2.82 → -1.56) Mistake. The best move was Ng4. } (10... Ng4 11. Qf4 Bd6 12. Qg5 Re8+ 13. Be2 f6 14. Qh5 g6 15. Qh4 Rxe2+ 16. Kxe2 Qb6 17. d4) 11. Ne5? { (-1.56 → -3.18) Mistake. The best move was O-O. } (11. O-O Nb4 12. Nc3 Nxd3 13. cxd3 Nd5 14. Qe5 Nb4 15. Qe4 Nc2 16. Rb1 Bf6 17. Na4 Bh3 18. Rd1 Re8 19. Qc4 Nd4 20. Nxd4 Qxd4) 11... Nd5? { (-3.18 → -1.60) Mistake. The best move was Qd5. } (11... Qd5 12. f3 Bd6 13. Bc4 Qxe5+ 14. Qxe5 Bxe5 15. c3 Bd6 16. d4 Bf5 17. O-O Rfe8 18. Bg5 Nd5 19. Nd2 b5 20. Bxd5 cxd5 21. Rfe1) 12. Qh5 Qe8?? { (-1.63 → Mate in 1) Checkmate is now unavoidable. The best move was Nf6. } (12... Nf6 13. Qe2 Nb4 14. Nc3 Re8 15. Bc4 Nxc2+ 16. Kd1 Nxa1 17. Nxf7 Qd4) 13. Qxh7# { Black is checkmated } 1-0
 +
</pgn>
 +
 +
== Stefan (1008) vs Javier (964) ==
 +
 +
A tense game with a leading White who started to make little mistakes then bigger mistakes then a fatal mistake that let Black recover from a lost piece to a winning position. The message here is: Javier can blunder, so he's reachable, but only once, so remain careful.
 +
 +
<pgn>
 +
[Event "Casual game"]
 +
[Site "http://lichess.org/jBD8G7Zy"]
 +
[Date "2015.03.18"]
 +
[White "Stefan"]
 +
[Black "Javier"]
 +
[Result "0-1"]
 +
[WhiteElo "?"]
 +
[BlackElo "?"]
 +
[PlyCount "114"]
 +
[Variant "Standard"]
 +
[TimeControl "10-0"]
 +
[ECO "C46"]
 +
[Opening "Four Knights Game, General"]
 +
[Annotator "lichess.org"]
 +
 +
1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 { Four Knights Game, General } 4. d3 Bc5 5. h3 O-O 6. a3 d5 7. exd5 Nxd5 8. Nxd5 Qxd5 9. c4 Qe6 10. Be2 Nd4 11. Ng5 Qf6 12. Be3 Nxe2 13. Bxc5?! { (-0.49 → -1.03) Inaccuracy. The best move was Ne4. } (13. Ne4 Qg6 14. Bxc5 Nd4 15. Bxd4 Qxg2 16. Kd2 exd4 17. Qh5 Qg6 18. Rag1 Qxh5 19. Nf6+ Kh8 20. Nxh5 g6 21. Ng3 Be6 22. Ne4 f6) 13... Re8? { (-1.03 → 0.71) Mistake. The best move was Qxg5. } (13... Qxg5 14. Qxe2 Qxg2 15. O-O-O Re8 16. Qe4 Qxe4 17. dxe4 b6 18. Be3 f5 19. f3 fxe4 20. fxe4 Bb7 21. Rhg1 g6 22. Rd7 Bxe4 23. a4) 14. Ne4 Qg6? { (0.80 → 2.46) Mistake. The best move was Qc6. } (14... Qc6 15. Qxe2 f5 16. Bb4 fxe4 17. Qxe4 Qxe4+ 18. dxe4 Be6 19. Rc1 a5 20. Bc3 Bf7 21. f3 a4 22. c5) 15. Qxe2 Qxg2? { (2.41 → 4.59) Mistake. The best move was f5. } (15... f5 16. Nd2 a5 17. f3 b6 18. Bg1 Bd7 19. Bh2 Qd6 20. O-O Rad8 21. Rae1 f4) 16. O-O-O Bxh3?? { (4.06 → 9.33) Blunder. The best move was Qg6. } (16... Qg6 17. Rhg1 Qf5 18. f4 Kh8 19. fxe5 Be6 20. Ng5 Rad8 21. Bxa7 h6 22. Rdf1 Qxd3 23. Qxd3 Rxd3 24. Nxe6 fxe6 25. Rf7 Ra8 26. Rfxg7) 17. Rdg1 Bg4?! { (9.33 → 19.56) Inaccuracy. The best move was Re6. } (17... Re6 18. Rxg2 Bxg2 19. Rh2 Rg6 20. f4 Bxe4 21. Qxe4 Re8 22. Qxb7) 18. Qxg4?? { (19.56 → 5.75) Blunder. The best move was Rxg2. } (18. Rxg2 f5 19. f3 b6 20. fxg4 f4 21. Bf2 c6 22. g5 Re7 23. Nf6+ Kf7 24. Rxh7 Rd8 25. Qg4 Kg6 26. Qh3 Rb8 27. Ne4 Rd8) 18... Qxg4 19. Rxg4 f5? { (5.68 → 7.22) Mistake. The best move was Re6. } (19... Re6 20. Rhg1 g6 21. Rh4 b6 22. Bb4 c5 23. Bd2 f5 24. Nc3 f4 25. Kc2 Rd8 26. Ne4 Kg7) 20. Rgh4?? { (7.22 → 3.53) Blunder. The best move was Nf6+. } (20. Nf6+ Kf7 21. Nxe8 fxg4 22. Nxc7 Rd8 23. Nd5 b6 24. Be3 h6 25. Rh4 Ke6 26. Rxg4 g5 27. Rg1 Kf5 28. Kc2 Kg6 29. Ne7+ Kf6) 20... fxe4 21. dxe4?! { (3.46 → 2.96) Inaccuracy. The best move was Rxh7. } (21. Rxh7 exd3 22. Kd2 a5 23. Kxd3 Rad8+ 24. Kc3 b6 25. Be3 Rd6 26. c5 Rde6 27. cxb6 cxb6 28. Kc4 Kf7 29. Kb5) 21... h6 22. Be3 Re6 23. Rg1 Kh7 24. Rhg4 Rg8 25. Bxa7?! { (2.98 → 2.37) Inaccuracy. The best move was Rh4. } (25. Rh4 b6 26. Kc2 Rg6 27. Rd1 Rd6 28. Rhh1 Rdd8 29. Rd5 Rge8 30. b3 Kg6) 25... b6 26. c5?! { (2.38 → 1.45) Inaccuracy. The best move was f4. } (26. f4 g5 27. fxg5 Ra8 28. Bxb6 cxb6 29. gxh6 Rc8 30. b3 b5 31. Rg7+ Kxh6 32. Rg8) 26... Rc6 27. Kb1 Rxc5 28. Rg6 Ra5 29. Bxb6?! { (1.50 → 0.87) Inaccuracy. The best move was Bb8. } (29. Bb8 Rc5 30. b4 Rc4 31. Ba7 Rc3 32. Kb2 Rf3 33. R1g2 Rf7 34. b5 Ra8 35. Bxb6 cxb6 36. Rxb6 h5 37. Re6 h4 38. Rxe5 Kh6) 29... cxb6 30. Rxb6 Ra4 31. f3 g5 32. Re6 Ra5?! { (1.57 → 2.17) Inaccuracy. The best move was Rf8. } (32... Rf8 33. Rg3 Rd4 34. Rh3 Kg7 35. Ka2 g4 36. fxg4 Rxe4 37. b4 Rb8 38. Kb2 Kf7 39. Rhxh6 Rxg4 40. Rhf6+ Kg7 41. Rf2 Re4 42. Rf3) 33. Rh1?! { (2.17 → 1.19) Inaccuracy. The best move was Rc1. } (33. Rc1 g4 34. Rcc6 Rg5 35. fxg4 Rxg4 36. Rxh6+ Kg7) 33... Rg6 34. Re7+ Rg7?! { (1.18 → 1.94) Inaccuracy. The best move was Kg8. } (34... Kg8 35. Rc1 Kf8 36. Rd7 Ra8 37. Rc5 Rf6 38. Kc1 Rb8 39. Rd3 Kg7 40. Rxe5 Rbf8 41. Rd7+ Kg6) 35. Rxg7+ Kxg7 36. b4? { (1.86 → -0.77) Mistake. The best move was Ka2. } (36. Ka2 Kg6 37. b4 Ra8 38. Kb3 h5 39. b5 g4 40. fxg4 hxg4 41. Rg1 Kg5 42. a4 Kf4 43. Kb4 g3 44. a5 Kf3) 36... Rxa3 37. Kb2?! { (-0.62 → -1.35) Inaccuracy. The best move was Kc2. } (37. Kc2 Rxf3 38. Rb1 g4 39. b5 Rf8 40. b6 Rb8 41. b7 h5 42. Kd3 Kf6 43. Rb6+ Kg5 44. Ke3 h4 45. Rb5 h3 46. Rxe5+ Kf6) 37... Rxf3 38. Rd1?! { (-0.98 → -1.88) Inaccuracy. The best move was b5. } (38. b5 g4 39. Kc2 Kg6 40. b6 Rf7 41. Kc3 Rb7 42. Rb1 h5 43. Kc4 h4 44. Kd5 g3 45. Kc6 Rb8 46. Kc7 Rh8 47. Rg1 Kg5) 38... Re3? { (-1.88 → -0.43) Mistake. The best move was g4. } (38... g4 39. b5 h5 40. b6 Rf8 41. Kc3 Rb8 42. Rb1 h4 43. Kd2 h3 44. Rg1 Rxb6) 39. b5 Rxe4 40. b6?? { (-0.55 → -4.05) Blunder. The best move was Kb3. } (40. Kb3 Rf4 41. b6 g4 42. b7 Rf8 43. Kc4 Rb8 44. Rb1 h5 45. Kd5 g3 46. Kxe5) 40... Rb4+ 41. Kc3 Rxb6 42. Rd5 Rc6+ 43. Kd3 Kf6 44. Ke4? { (-4.05 → -5.15) Mistake. The best move was Rd8. } (44. Rd8 Kf5 45. Rh8 g4 46. Ke3 Rc3+ 47. Kf2 Rh3 48. Kg2 h5 49. Rf8+ Ke4 50. Rg8 Kf4 51. Rf8+ Ke3 52. Rg8 e4 53. Rg7 Kf4) 44... Rc4+ 45. Kd3?? { (-4.99 → Mate in 17) Checkmate is now unavoidable. The best move was Ke3. } (45. Ke3 h5 46. Rd8 h4 47. Rf8+ Ke6 48. Rh8 Kf5 49. Kd3 Ra4 50. Ke2 Kf4 51. Rf8+ Kg4 52. Rb8 h3 53. Kf2 Ra1 54. Rb4+ e4) 45... Rd4+ 46. Rxd4 exd4 47. Kxd4 Kf5 48. Ke3 Kg4 49. Kf2 h5 50. Kg2 h4 51. Kh2 Kf4 52. Kh3 g4+ 53. Kxh4 g3 54. Kh3 Kf3 55. Kh4 g2 56. Kh3 g1=Q 57. Kh4 Qg4# { White is checkmated } 0-1
 +
</pgn>
 +
 +
== Camilo (952) vs Amir (990) ==
 +
 +
An equilibrated game, that Black loses on time, allowing not to be mated next move, although the mating position had already occured. A couple of times, the battle swung back to a possible win for both sides and even came to a nice confrontation of strong positional advantage against strong material advantage after 19. dxc4??, although the last attack from Camilo, stabbing the rook, was a decisive one. Interestingly, 17. Rxe6+ (where even a mate was announced) is not a mistake, as it allows to pursue the same idea with the other rook, which did not happen in the game, illustrating again how weak is the move that follows a supposed mistake on the board. White wins 7 points, Black looses 35 in this provisional game.
 +
 +
<pgn>
 +
[Event "Casual game"]
 +
[Site "http://lichess.org/HTe1UFKX"]
 +
[Date "2015.03.20"]
 +
[White "Camilo"]
 +
[Black "Amir"]
 +
[Result "1-0"]
 +
[WhiteElo "?"]
 +
[BlackElo "?"]
 +
[PlyCount "44"]
 +
[Variant "Standard"]
 +
[TimeControl "-"]
 +
[ECO "C00"]
 +
[Opening "French Defense, General"]
 +
[Annotator "lichess.org"]
 +
 +
1. e4 e6 { French Defense, General } 2. Bc4 c6 3. Nf3 Nh6?! { (-0.21 → 0.57) Inaccuracy. The best move was d5. } (3... d5 4. exd5 exd5 5. Be2 Nf6 6. d3 Bd6 7. c4 O-O 8. Nc3 Be6 9. O-O Nbd7 10. Be3 Ng4 11. cxd5 Nxe3 12. fxe3 Bxd5 13. d4) 4. d3 Bd6?! { (0.08 → 0.96) Inaccuracy. The best move was d5. } (4... d5 5. Bg5 Qd7 6. exd5 cxd5 7. Bb3 Nc6 8. O-O Nf5 9. c4 dxc4 10. Bxc4 h6 11. Bf4 Be7 12. Nc3 O-O 13. Bb5 f6 14. Ne4) 5. Bg5 Be7 6. O-O?? { (0.60 → -2.53) Blunder. The best move was Bxh6. } (6. Bxh6 gxh6 7. Bb3 d5 8. Nc3 Nd7 9. O-O h5 10. Qd2 b5 11. exd5 exd5) 6... f6?? { (-2.53 → 1.27) Blunder. The best move was Bxg5. } (6... Bxg5 7. Nxg5 Qxg5 8. d4 d5 9. Bd3 dxe4 10. Bxe4 Nf5 11. c3 O-O 12. Nd2 Nd7 13. Re1 Rd8 14. Nf3 Qh5 15. a3 g6 16. Nd2) 7. Bxh6 gxh6 8. Nh4 f5?? { (0.79 → 4.23) Blunder. The best move was O-O. } (8... O-O 9. Nf5 Kh8 10. Nxe7 Qxe7 11. Bb3 Na6 12. Nd2 d5 13. c3 b6 14. Re1 Bb7 15. d4 Nc7 16. a3 Qg7 17. g3 e5 18. Qh5) 9. Qh5+ Kf8 10. Qxh6+? { (4.25 → 1.94) Mistake. The best move was Nxf5. } (10. Nxf5 d5 11. exd5 cxd5 12. Qxh6+ Ke8 13. Nxe7 Qxe7 14. Bxd5 Kd8 15. Nc3 Nc6 16. Rae1 Rg8) 10... Ke8? { (1.94 → 4.27) Mistake. The best move was Kg8. } (10... Kg8 11. Nxf5 Bf8 12. Qf4 d5 13. exd5 cxd5 14. Qg3+ Kf7 15. Ne3 dxc4 16. Nxc4 Bg7 17. Nc3 Kg8 18. Ne4 Nc6 19. Rfe1 Nb4 20. Ncd6) 11. Nc3?? { (4.27 → -0.27) Blunder. The best move was Qh5+. } (11. Qh5+ Kf8 12. Nxf5 d5 13. exd5 cxd5 14. Qh6+ Ke8 15. Nxe7 Qxe7 16. Bxd5 Kd8 17. Nc3 Rg8 18. Be4 Nc6 19. d4 Qg5 20. Qxg5+ Rxg5) 11... Bxh4 12. exf5 Bg5?? { (-0.55 → 2.76) Blunder. The best move was Qg5. } (12... Qg5 13. Qxg5 Bxg5 14. fxe6 dxe6 15. Ne4 Be7 16. c3 Na6 17. f4 Nc7 18. Rae1 Nd5 19. Ng5 Nxf4 20. Nxe6 Nxe6 21. Bxe6 Rf8 22. Bb3) 13. Qh5+ Ke7?? { (2.81 → 6.39) Blunder. The best move was Kf8. } (13... Kf8 14. fxe6 dxe6 15. Ne4 Bf4 16. g3 b5 17. Bb3 Rg8 18. Qf3 Qh4 19. Kh1 Qg4 20. Qxf4+ Qxf4 21. gxf4 Rg4 22. a4 Rxf4 23. axb5) 14. Qxg5+ Ke8 15. Qg7? { (6.38 → 4.91) Mistake. The best move was Qh5+. } (15. Qh5+ Ke7 16. fxe6 dxe6 17. Ne4 Qf8 18. Qg5+ Ke8 19. Qe5 Kd8 20. Ng5 Rg8 21. Rfe1 Bd7) 15... Rf8 16. Rae1? { (4.67 → 3.29) Mistake. The best move was fxe6. } (16. fxe6 dxe6 17. Rae1 Qe7 18. Qd4 Na6 19. Bxa6 bxa6 20. Ne4 e5) 16... d5? { (3.29 → 5.27) Mistake. The best move was Rxf5. } (16... Rxf5 17. Qxh7 Qe7 18. Qg8+ Rf8 19. Qg3 Kd8 20. d4 d6 21. a3 Na6 22. Ne4 Kc7 23. Ng5 Rf6 24. Qb3 Qg7 25. f4 d5 26. Bxa6) 17. Rxe6+ Bxe6 18. fxe6?? { (5.06 → 1.43) Blunder. The best move was Re1. } (18. Re1 Rf6 19. Rxe6+ Rxe6 20. fxe6 Qe7 21. Qg8+ Qf8 22. Qxh7 Qe7 23. Qg8+ Qf8 24. Qg6+ Kd8 25. Bxd5 Nd7 26. exd7 cxd5 27. Qh5 Qe7) 18... dxc4? { (1.43 → 3.38) Mistake. The best move was Qe7. } (18... Qe7 19. Qe5 dxc4 20. Ne4 c3 21. Nd6+ Kd8 22. Re1 b6 23. bxc3 Na6 24. g4 Nc7 25. Nf5 Rxf5 26. gxf5 Ne8 27. d4 Kc8 28. d5) 19. dxc4?? { (3.38 → 0.00) Blunder. The best move was Qxb7. } (19. Qxb7 cxd3 20. Qxa8 Qb6 21. Na4 Qc7 22. cxd3 Ke7 23. Rc1 Kxe6 24. Nc5+ Kf7 25. Ne4 Kg8 26. Rc3 Qa5 27. a3 Qb6 28. b4 Rd8) 19... Qf6?? { (0.00 → 5.48) Blunder. The best move was Qe7. } (19... Qe7 20. Qe5 Rf6 21. Re1 Na6 22. Ne4 Rxe6 23. Qh8+ Qf8 24. Qxh7 Rd8 25. Qh5+ Ke7 26. Qh7+ Ke8) 20. Qxb7 Na6?? { (4.72 → Mate in 1) Checkmate is now unavoidable. The best move was Qe7. } (20... Qe7 21. Qxa8 Qc7 22. Re1 Ke7 23. Re3 Rd8 24. Rh3 Kxe6 25. Rh6+ Kf5 26. g3 Rd2) 21. Qxa8+?! { (Mate in 1 → 15.68) Lost forced checkmate sequence. The best move was Qd7#. } (21. Qd7#) 21... Qd8 22. Qxc6+ Qd7?! { Black loses on time (42.36 → Mate in 1) Checkmate is now unavoidable. The best move was Ke7. } (22... Ke7 23. Nd5+ Qxd5 24. cxd5 Kf6 25. Qxa6 Kg7 26. Qxa7+ Kg8 27. d6 h5 28. e7 Re8) 1-0
 +
</pgn>
 +
 +
== Amir (955) vs Santiago (1001) ==
 +
 +
<pgn>
 +
[Event "Casual game"]
 +
[Site "http://lichess.org/VeyYsCZC"]
 +
[Date "2015.03.23"]
 +
[White "Amir"]
 +
[Black "Santiago"]
 +
[Result "1-0"]
 +
[WhiteElo "?"]
 +
[BlackElo "?"]
 +
[PlyCount "63"]
 +
[Variant "Standard"]
 +
[TimeControl "-"]
 +
[ECO "A00"]
 +
[Opening "Mieses Opening, Reversed Rat"]
 +
[Annotator "lichess.org"]
 +
 +
1. d3 e5 { Mieses Opening, Reversed Rat } 2. Nf3 d6 3. Bg5 f6 4. Be3?! { (0.10 → -0.46) Inaccuracy. The best move was Bd2. } (4. Bd2 f5 5. c4 Nf6 6. Nc3 Nc6 7. e3 Be7 8. Be2 O-O 9. O-O Bd7 10. a3 h6 11. d4 e4 12. Nh4) 4... Nc6 5. Nc3 f5 6. Bg5 Be7 7. Nd5?! { (-0.25 → -1.17) Inaccuracy. The best move was Bxe7. } (7. Bxe7 Ngxe7 8. e3 d5 9. Be2 d4 10. exd4 exd4 11. Nb1 O-O 12. O-O Be6 13. Nbd2 Nd5 14. Re1 Re8) 7... e4?! { (-1.17 → -0.63) Inaccuracy. The best move was Bxg5. } (7... Bxg5 8. Nxg5 Nf6 9. c4 Nxd5 10. cxd5 Qxg5 11. dxc6 bxc6 12. Rc1 Rb8 13. Rxc6 Rxb2 14. Rxc7 O-O 15. Rc2 Rxc2 16. Qxc2 Be6 17. h4) 8. dxe4 fxe4 9. Nh4?? { (-0.70 → -4.54) Blunder. The best move was Bxe7. } (9. Bxe7 Ncxe7 10. Nxe7 Nxe7 11. Nd4 e3 12. fxe3 c5 13. Nf3 Qb6 14. Qd2 Qxb2 15. Rd1 d5 16. e4) 9... Bxg5 10. e3? { (-4.79 → -6.63) Mistake. The best move was g3. } (10. g3 Nf6 11. Ng2 Ne5 12. h4 Bh6 13. Ndf4 O-O 14. Qd4 c5 15. Qc3 b6 16. Ne3 Nfg4 17. Qb3+ Kh8 18. Ned5 Bb7 19. Bg2 Bxf4) 10... Nf6? { (-6.63 → -4.91) Mistake. The best move was Bxh4. } (10... Bxh4 11. Nxc7+ Qxc7 12. Qh5+ Qf7 13. Qxh4 Nf6 14. Be2 O-O 15. O-O Ne5 16. Qf4 Bd7 17. Rfd1 Qe7 18. Qh4 Rac8 19. c3 d5 20. a3) 11. Bb5? { (-4.91 → -7.17) Mistake. The best move was g3. } (11. g3 O-O 12. Be2 Ne5 13. Ng2 c6 14. Nxf6+ Bxf6 15. c3 d5 16. h4 a5 17. Nf4 a4 18. O-O a3 19. b4 Bd7 20. Rc1 g6) 11... Bg4?? { (-7.17 → -2.18) Blunder. The best move was Bxh4. } (11... Bxh4 12. g3 a6 13. Be2 Bg5 14. h4 Bh6 15. g4 Be6 16. Bc4 Ne5 17. Nxf6+ Qxf6 18. Bxe6 Qxe6 19. g5 Nf3+ 20. Kf1 Qc4+ 21. Qe2) 12. f3?? { (-2.18 → -8.80) Blunder. The best move was Nxf6+. } (12. Nxf6+ Qxf6 13. Qxg4 O-O 14. O-O Bxh4 15. g3 Bg5 16. Qxe4 Rae8 17. Qd5+ Kh8 18. a4 Re5 19. Qg2 Rc5 20. f4 Bh6 21. c3 a6) 12... Be6?? { (-8.80 → -5.41) Blunder. The best move was Bxh4+. } (12... Bxh4+ 13. Ke2 Bd7 14. Nc3 exf3+ 15. gxf3 Qe7 16. Kd2 O-O-O 17. Qe2 Rde8 18. Rhg1) 13. f4?? { (-5.41 → -9.34) Blunder. The best move was Nf4. } (13. Nf4 Bd7 14. g3 Bxh4 15. gxh4 Ne5 16. Bxd7+ Nfxd7 17. fxe4 Qxh4+ 18. Kd2 O-O 19. Kc1 Rae8 20. a4 Rf7 21. Qe2 Nc5 22. Ra3 Nxe4) 13... Bxd5?? { (-9.34 → -2.53) Blunder. The best move was Bxh4+. } (13... Bxh4+ 14. g3 Nxd5 15. Qh5+ g6 16. Qxh4 Qxh4 17. gxh4 Nxe3 18. Kd2 Ng2 19. h5 e3+ 20. Kd3 Bf5+ 21. Ke2 Bg4+ 22. Kd3 e2 23. Kd2) 14. fxg5 Nd7?? { (-2.62 → 0.39) Blunder. The best move was Be6. } (14... Be6 15. gxf6 Qxf6 16. Qh5+ g6 17. Qh6 Qxb2 18. Bxc6+ bxc6 19. O-O Qe5 20. Qf4 O-O-O 21. Qxe5 dxe5 22. a4 Rd2 23. c3 Rhd8 24. Rf6) 15. Qh5+?? { (0.39 → -4.79) Blunder. The best move was Qxd5. } (15. Qxd5 Nce5 16. Nf5 Qxg5 17. Qe6+ Kd8 18. Bxd7 g6 19. O-O-O Nxd7 20. Nxd6 cxd6 21. Rxd6 Qe7) 15... g6 16. Qh6 a6? { (-4.87 → -3.55) Mistake. The best move was Nce5. } (16... Nce5 17. Qg7 Rg8 18. Bxd7+ Qxd7 19. Qxd7+ Kxd7 20. b3 Nf7 21. Rf1 Nxg5 22. O-O-O Be6 23. Kb2) 17. Be2? { (-3.55 → -4.87) Mistake. The best move was Bxc6. } (17. Bxc6 bxc6 18. Nxg6 Rg8 19. Nf4 Qxg5 20. Qxh7 O-O-O 21. O-O-O Nf6 22. Qh3+ Kb7 23. Kb1 Bf7 24. Rhf1 Rh8 25. Ne6 Bxe6 26. Qxe6 Nd5) 17... Nde5 18. Rf1 Nb4? { (-5.59 → -3.70) Mistake. The best move was Qe7. } (18... Qe7 19. O-O-O Bxa2 20. b3 O-O-O 21. Kb2 Nb4 22. Rd4 d5 23. c3 c5 24. Rxb4 cxb4 25. Kxa2 bxc3 26. Rc1 Qc5 27. Qg7) 19. Rf6?? { (-3.70 → -8.71) Blunder. The best move was O-O-O. } (19. O-O-O Nxa2+ 20. Kb1 c6 21. Nxg6 Nc3+ 22. bxc3 Qb6+ 23. Ka1 Qa5+ 24. Kb1 Nxg6 25. c4) 19... Nxc2+ 20. Kd2 Nxa1 21. Qg7? { (-8.50 → -10.08) Mistake. The best move was Nxg6. } (21. Nxg6 Nxg6 22. Rxg6 hxg6 23. Qxh8+ Kd7 24. Bg4+ Be6 25. Qg7+ Qe7 26. Bxe6+ Kxe6 27. Qxg6+ Kd5 28. Qf5+ Kc6 29. Qa5 Rf8 30. h4 Rf2+) 21... Qd7?? { (-10.08 → 0.42) Blunder. The best move was Rg8. } (21... Rg8 22. Qxh7 c6 23. Kd1 Qd7 24. Qxd7+ Kxd7 25. b3 Raf8 26. Rf4 Rh8 27. Rxf8 Rxf8 28. Kd2 Rh8 29. g3 Rf8 30. Ng2) 22. Qxh8+ Ke7 23. Qg7+?? { (0.99 → -2.41) Blunder. The best move was Qxa8. } (23. Qxa8 Qa4 24. Rf8 Bxa2 25. Qd8+ Ke6 26. Qxc7 Qb4+ 27. Qc3 Nb3+ 28. Ke1 Qxc3+ 29. bxc3 Nc1 30. Rh8 Nxe2 31. Kxe2 Kd7 32. Rxh7+ Kc6) 23... Bf7 24. Rf4? { (-2.48 → -4.86) Mistake. The best move was Rxf7+. } (24. Rxf7+ Nxf7 25. Qxh7 Re8 26. Qxg6 Qe6 27. Qxe6+ Kxe6 28. Bg4+ Ke7 29. Ng6+ Kd8 30. h4 b5 31. b3 Ne5 32. Bf5 Nxg6 33. Bxg6 Re6) 24... Rg8?? { (-4.86 → -0.12) Blunder. The best move was Qa4. } (24... Qa4 25. Rxf7+ Nxf7 26. Qxh7 Qa5+ 27. Kd1 Qd5+ 28. Kc1 Re8 29. Qg7 Kd8 30. Nxg6 Qxa2 31. Bg4 c5 32. Nf4 Qc4+ 33. Kb1 Nb3 34. Qf6+) 25. Qxh7?? { (-0.12 → -5.81) Blunder. The best move was Rxf7+. } (25. Rxf7+ Nxf7 26. Qxg8 Nxg5 27. Qg7+ Kd8 28. Qh6) 25... Qe6 26. Bg4?? { (-5.91 → -11.63) Blunder. The best move was Rxf7+. } (26. Rxf7+ Qxf7 27. Qxf7+ Kxf7 28. g3 Rh8 29. b3 Kg7 30. h3 Rf8 31. Ng2 Rf2 32. Nf4 Nf3+ 33. Kc3 Nxg5 34. h4 Nf3 35. a3 Ne5) 26... Qd5+ 27. Ke2 Qc4+ 28. Kf2 Qc2+?? { (-9.75 → -3.63) Blunder. The best move was Nd3+. } (28... Nd3+ 29. Kg3 Nxf4 30. Kxf4 Qb5 31. Kxe4 Qxg5 32. h3 Qd5+ 33. Kf4 g5+ 34. Kg3 Qe5+ 35. Kf2 Qxb2+ 36. Kg1 gxh4 37. Qxh4+ Ke8 38. Bf3) 29. Kg3 Nd3?? { (-2.93 → Mate in 2) Checkmate is now unavoidable. The best move was Qxb2. } (29... Qxb2 30. Rxf7+ Nxf7 31. Qxg8 Qe5+ 32. Kf2 Qxg5 33. Qh7 Qxg4 34. Nxg6+ Kf6 35. Nf4 Nc2 36. Qxe4 Qh4+ 37. g3 Qxh2+ 38. Ng2 Na3 39. Qxb7) 30. Qxf7+ Kd8 31. Qxg8+?! { (Mate in 1 → Mate in 1) Not the best checkmate sequence. The best move was Qd7#. } (31. Qd7#) 31... Ke7 32. Rf7# { Black is checkmated } 1-0
 +
</pgn>
 +
 +
== Amir (982) vs Carlos (1013) ==
 +
 +
<pgn>
 +
[Event "Casual game"]
 +
[Site "http://lichess.org/xAoftldq"]
 +
[Date "2015.03.24"]
 +
[White "Amir"]
 +
[Black "Carlos"]
 +
[Result "0-1"]
 +
[WhiteElo "?"]
 +
[BlackElo "?"]
 +
[PlyCount "42"]
 +
[Variant "Standard"]
 +
[TimeControl "-"]
 +
[ECO "A00"]
 +
[Opening "Mieses Opening, Reversed Rat"]
 +
[Annotator "lichess.org"]
 +
 +
1. d3 e5 { Mieses Opening, Reversed Rat } 2. f3?! { (0.03 → -0.67) Inaccuracy. The best move was Nf3. } (2. Nf3 Nc6 3. c4 Bb4+ 4. Nbd2 Nf6 5. a3 Bxd2+ 6. Bxd2 d6 7. e3 O-O 8. Be2) 2... d5 3. Qd2 Nf6 4. Qe3 Nc6 5. d4 Bd6 6. Qb3?? { (-1.91 → -9.19) Blunder. The best move was dxe5. } (6. dxe5 Bxe5 7. Qd2 O-O 8. e3 Re8 9. Ne2 Bf5 10. c3 Bd6 11. Na3 a6 12. Nc2 Bg6 13. Ng3 Qe7 14. Be2 Nd7) 6... Nxd4 7. Qb5+?! { (-9.32 → -13.08) Inaccuracy. The best move was Qd3. } (7. Qd3 Bf5 8. Qd1 Nxc2+ 9. Kf2 Nxa1 10. Na3 Bc5+ 11. e3 d4 12. Be2 d3 13. b4 dxe2 14. Nxe2 Qxd1 15. Rxd1 Bxb4 16. e4 Be6) 7... Nxb5 8. e3 Bf5 9. Bxb5+ c6 10. Ba4 Qa5+ 11. Kf1 Qxa4 12. e4 dxe4 13. Bg5 Qc4+ 14. Kf2 Nh5 15. fxe4 Bc5+ 16. Be3?! { (-29.51 → Mate in 9) Checkmate is now unavoidable. The best move was Ke1. } (16. Ke1 Qxe4+ 17. Ne2 Qxg2 18. Rf1 Qxg5 19. b3 Bxc2 20. Nbc3 Rd8 21. Rf3 e4 22. b4) 16... Qxc2+?! { (Mate in 9 → -31.37) Lost forced checkmate sequence. The best move was Bxe3+. } (16... Bxe3+ 17. Kxe3 Qd4+ 18. Ke2 Nf4+ 19. Kf1 Qd1+ 20. Kf2 Qxc2+ 21. Nd2 Qxd2+ 22. Kf3 Bxe4+ 23. Kxe4 Qd3+ 24. Kxe5 Ng6#) 17. Nd2?! { (-31.37 → Mate in 4) Checkmate is now unavoidable. The best move was Ne2. } (17. Ne2 Bxe3+ 18. Kxe3 Qxe4+ 19. Kf2 Nf4 20. Nbc3) 17... Bxe4?! { (Mate in 4 → -29.93) Lost forced checkmate sequence. The best move was Qxd2+. } (17... Qxd2+ 18. Kf1 Qxe3 19. Nh3 Bxh3 20. gxh3 Qf2#) 18. Kf1?! { (-29.93 → Mate in 6) Checkmate is now unavoidable. The best move was Ke1. } (18. Ke1 Bxe3 19. Nxe4 Qxe4 20. Nh3 Qxg2 21. Rg1) 18... Bxe3 19. Ke1 Qxd2+ 20. Kf1 Bd3+?! { (Mate in 1 → Mate in 1) Not the best checkmate sequence. The best move was Bxg2#. } (20... Bxg2#) 21. Ne2 Qxe2# { White is checkmated } 0-1
 +
</pgn>
 +
 +
== Carlos (1028) vs Pablo (923) ==
 +
 +
Lost on time but lost strategically as well from a too nervous Black who let White come back.
 +
 +
<pgn>
 +
[Event "Casual game"]
 +
[Site "http://lichess.org/MBfiF6n7"]
 +
[Date "2015.03.25"]
 +
[White "Carlos"]
 +
[Black "Pablo"]
 +
[Result "1-0"]
 +
[WhiteElo "?"]
 +
[BlackElo "?"]
 +
[PlyCount "46"]
 +
[Variant "Standard"]
 +
[TimeControl "-"]
 +
[ECO "C55"]
 +
[Opening "Italian Game, Two Knights Defense"]
 +
[Annotator "lichess.org"]
 +
 +
1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 { Italian Game, Two Knights Defense } 4. Nc3 Bc5 5. d3 Bb4 6. Bd2 Bxc3 7. Bxc3 O-O?! { (0.25 → 0.89) Inaccuracy. The best move was d6. } (7... d6 8. O-O O-O 9. a4 a6 10. b4 Bg4 11. h3 Bxf3 12. Qxf3 Re8 13. Rfb1 Nd4 14. Bxd4 exd4 15. e5 dxe5 16. Qxb7 e4) 8. g3? { (0.89 → -0.20) Mistake. The best move was Nxe5. } (8. Nxe5 d5 9. exd5 Nxe5 10. Bxe5 b5 11. Bb3 a5 12. a4 bxa4 13. Bc4 Ng4 14. d4 Nxe5 15. dxe5 Qg5 16. O-O Qxe5 17. Re1 Qxb2) 8... h6?! { (-0.20 → 0.59) Inaccuracy. The best move was d6. } (8... d6 9. O-O Bg4 10. a4 a6 11. Re1 Re8 12. b4) 9. Nh4?! { (0.59 → -0.10) Inaccuracy. The best move was Nxe5. } (9. Nxe5 d5 10. exd5 Nxe5 11. Bxe5 b5 12. Bb3 a5 13. a4 bxa4 14. Bc4 Bh3 15. Kd2 Nxd5 16. Qh5 Be6 17. f4 f6 18. Bd4 Bf7) 9... d6 10. h3 a6 11. f4 b5 12. Bd5?! { (-0.39 → -1.34) Inaccuracy. The best move was Bb3. } (12. Bb3 exf4 13. Ng6 Nxe4 14. Nxf8 Nxg3 15. Qf3 Qe8+ 16. Kd2 Qe3+ 17. Qxe3 fxe3+ 18. Kxe3 Nxh1) 12... Nxd5 13. exd5 Ne7 14. fxe5 dxe5 15. Bxe5? { (-1.18 → -2.82) Mistake. The best move was Qf3. } (15. Qf3 Qxd5 16. a4 g5 17. Qxd5 Nxd5 18. Nf3 Nxc3 19. bxc3 Bb7 20. O-O f6 21. Nd2 Kg7 22. Rfb1 Bc6 23. axb5 axb5 24. Kf2 Rfd8) 15... Qxd5 16. Qe2?? { (-3.02 → -7.11) Blunder. The best move was Nf3. } (16. Nf3 f6 17. Bf4 g5 18. Bxc7 Nf5 19. Qe2 Qc6 20. O-O-O Qxc7 21. Rhg1 Bd7 22. Qf2 Rac8 23. g4 Ne3 24. Rd2 Rfe8 25. Re1 Nd5) 16... Qxh1+ 17. Qf1 Qd5 18. Qe2? { (-6.94 → -9.35) Mistake. The best move was Bc3. } (18. Bc3 Re8 19. Kd1 Qg5 20. Nf3 Qxg3 21. Be5 Qg6 22. Kc1 Nd5 23. Bd4 Qh5 24. h4) 18... Bxh3? { (-9.35 → -8.12) Mistake. The best move was Nc6. } (18... Nc6 19. Bxc7 Nd4 20. Qe5 Qxe5+ 21. Bxe5 Nxc2+ 22. Kd1 Nxa1 23. b4) 19. O-O-O? { (-8.12 → -9.27) Mistake. The best move was Qe4. } (19. Qe4 Rfe8 20. Kd2 Qxe4 21. dxe4 Rad8+ 22. Kc1 Nd5 23. Nf3 f6 24. exd5 fxe5 25. Kd2 Rxd5+ 26. Ke3 Bf5 27. Rc1 Red8 28. Nh4 Bh7) 19... g5?? { (-9.27 → -5.44) Blunder. The best move was Nc6. } (19... Nc6 20. Bxg7 Kxg7 21. Kb1 Rfe8 22. Qf2 Qe5 23. Ng2 Bxg2 24. Qxg2 Qe2 25. Qg1 Nb4 26. Rc1) 20. Nf3? { (-5.44 → -7.61) Mistake. The best move was Bf6. } (20. Bf6 Nf5 21. Nxf5 Qxf5 22. Bc3 Rae8 23. Qh2 h5 24. Qg1 c5 25. b4 Rc8 26. bxc5) 20... Nf5? { (-7.61 → -6.11) Mistake. The best move was Bg4. } (20... Bg4 21. Rf1 Bxf3 22. Rxf3 Nc6 23. Re3 Nxe5 24. Rxe5 Qxa2 25. b3 Rad8 26. Kd2 Rd6 27. Qe4 Rf6 28. Qd4 Rc6 29. Rc5 Rxc5 30. Qxc5) 21. Qh2?? { (-6.11 → -10.29) Blunder. The best move was Qe4. } (21. Qe4 Qxa2 22. Nd4 Nxd4 23. Qxd4 f6 24. Bxf6 c5 25. Qe4 Rxf6 26. Qxa8+ Rf8 27. Qe4 Qa1+ 28. Kd2 Rf2+ 29. Ke3 Qxd1 30. Kxf2 Qxc2+) 21... Ne3? { (-10.29 → -8.44) Mistake. The best move was Qxf3. } (21... Qxf3 22. Qxh3 Qe3+ 23. Kb1 Qxe5 24. Rc1 Rfe8 25. g4 Qg3 26. Qh5 Qh4 27. Qxh4 Nxh4 28. c4 f5 29. cxb5 fxg4 30. bxa6) 22. Qxh3 Rfd8?? { (-8.86 → 23.68) Blunder. The best move was Qxf3. } (22... Qxf3 23. Rh1 Qe2 24. Kb1 Qxc2+ 25. Ka1 Qxd3 26. a3 Nc2+ 27. Ka2 Qd5+ 28. Kb1 Nxa3+ 29. bxa3 Qxe5 30. Qxh6 Qg7 31. Qc6 Qg6+ 32. Qxg6+) 23. Qxh6 Qxe5 { Black resigns } 1-0
 +
</pgn>
 +
 +
== Carlos (1039) vs Javier (1009) ==
 +
 +
The PolaChess game of the century. So crazy, its records got lost and the game had to be reconstructed from scratch and sheer efforts of the memory. Our first draw of the tournament with a dispute on whether Black was flagged on time (which couldn't be since White moved last anyway, leaving two naked kings on the board). Black, at the same time, had a mate in 29 moves on the 40th one. But not enough time, not enough concentration, time flew away as the queen promoted and an ultimate embrace of the king and queen of two colors led to a shouting sequence in the cafeteria. Dust settled down, agreement was reached, Black got 5 little points out of it, White lost one.
 +
 +
<pgn>
 +
[Event "Casual game"]
 +
[Site "http://lichess.org/1ZiyJz2f"]
 +
[Date "2015.03.26"]
 +
[White "Carlos"]
 +
[Black "Javier"]
 +
[Result "1/2-1/2"]
 +
[WhiteElo "?"]
 +
[BlackElo "?"]
 +
[PlyCount "113"]
 +
[Variant "Standard"]
 +
[TimeControl "-"]
 +
[ECO "B01"]
 +
[Opening "Scandinavian Defense, Modern Variation"]
 +
[Annotator "lichess.org"]
 +
 +
1. e4 d5 2. exd5 Nf6 { Scandinavian Defense, Modern Variation } 3. Bc4 Nxd5 4. Bxd5?! { (0.24 → -0.46) Inaccuracy. The best move was Nf3. } (4. Nf3 Nc6 5. Nc3 e6 6. O-O Be7 7. d4 O-O 8. Bd3 Ncb4) 4... Qxd5 5. Nc3?! { (-0.52 → -1.27) Inaccuracy. The best move was Nf3. } (5. Nf3 Qe4+ 6. Qe2 Qxc2 7. Nc3 Bd7 8. d4 Qxe2+ 9. Kxe2 g6 10. Bf4 Na6 11. Rad1 Bg7 12. Ne5 Be6 13. d5 Bf5 14. g4 Bxe5) 5... Qxg2 6. Qf3 Qxf3 7. Nxf3 a6? { (-1.26 → 0.02) Mistake. The best move was Bg4. } (7... Bg4 8. Ne5 Bh3 9. d4 f6 10. Nc4 Nc6 11. Be3 e6 12. O-O-O O-O-O 13. Rhg1 g5 14. b3 a6 15. Kb2 b5 16. d5 exd5) 8. a4? { (0.02 → -1.26) Mistake. The best move was Nd5. } (8. Nd5 Kd8 9. Ng5 Be6 10. Nf4 Kd7 11. d4 Bf5 12. Nxf7 Rg8 13. c3 Nc6 14. d5 Na5 15. Be3) 8... Bd7 9. d4?! { (-0.88 → -1.45) Inaccuracy. The best move was Nd5. } (9. Nd5 Kd8 10. Ne3 Nc6 11. d4 e6 12. Bd2 Bd6 13. Rg1 g6 14. O-O-O h5 15. Nc4 Ke7 16. d5 exd5 17. Nxd6 cxd6 18. Rde1+ Be6) 9... e6 10. d5 Bb4 11. Bd2 Bxc3 12. Bxc3 f6 13. dxe6 Bc6?! { (-0.86 → -0.12) Inaccuracy. The best move was Bxe6. } (13... Bxe6 14. Nd4 Bd7 15. Rg1 Kf7 16. O-O-O h5 17. Rge1 Nc6 18. b3 Rhe8 19. Rxe8 Rxe8 20. Nb5 Bg4 21. Nxc7 Rc8 22. f3 Rxc7 23. fxg4) 14. Ke2 O-O 15. Rad1? { (-0.06 → -1.41) Mistake. The best move was Rhg1. } (15. Rhg1 Re8 16. Nd4 Be4 17. Kd2 c5 18. Nb3 b6 19. Bxf6 Bg6 20. Bc3 Rxe6 21. Rae1 Rxe1 22. Rxe1 Nc6 23. Re6 Be8 24. a5 Bd7) 15... Bxf3+? { (-1.41 → 0.95) Mistake. The best move was Re8. } (15... Re8 16. Ke3 Nd7 17. Rhe1 Rxe6+ 18. Kf4 Rxe1 19. Rxe1 Bxa4 20. b3 Nb6 21. Ba5 Bd7 22. c4 g5+ 23. Kg3 Kf7 24. Nd4) 16. Kxf3 Re8 17. Rhe1 Nc6 18. b4?! { (0.72 → 0.00) Inaccuracy. The best move was Rd7. } (18. Rd7 Re7 19. Kf4 Rxd7 20. exd7 Kf7 21. Kf5 Rd8) 18... b5 19. axb5 axb5 20. Rd7 Ra3 21. Re3 Rxc3? { (-0.25 → 2.17) Mistake. The best move was Nd8. } (21... Nd8 22. Rxc7 Nxe6 23. Rc6 Kf7 24. Rd3 Re7 25. Rd5 Kg6 26. h4) 22. Rxc3 Ne5+ 23. Kf4 Nxd7 24. exd7 Rd8 25. Rxc7 Kf7 26. Rc8? { (2.05 → 0.24) Mistake. The best move was Ke4. } (26. Ke4 Ke6 27. Rb7 Rg8 28. Kd4 Kd6 29. Rxb5 Kxd7 30. c4 Kc6 31. Rc5+ Kb7 32. Rd5 Kc7 33. Ra5 Rd8+ 34. Kc5 Kb7 35. Ra2) 26... Ke7?? { (0.24 → 3.92) Blunder. The best move was Rxd7. } (26... Rxd7 27. Ke3 Re7+ 28. Kd3 Rd7+ 29. Kc3 Ke6 30. Rc6+ Rd6 31. Rc7 Rd7 32. Rxd7 Kxd7 33. Kd4 Kc6 34. h3 h6 35. c4 g5) 27. Rc7?? { (3.92 → 0.08) Blunder. The best move was Rxd8. } (27. Rxd8 Kxd8 28. Ke4 Kxd7 29. Kd5 Kc7 30. Kc5 f5 31. Kxb5 Kb7 32. c4 Kc7 33. c5 Kb7 34. c6+ Kc7 35. Kc5 Kb8 36. b5 Kc8) 27... Rxd7 28. Rxd7+ Kxd7 29. h4 Ke6 30. h5 Kf7? { (-0.06 → 1.66) Mistake. The best move was Kd5. } (30... Kd5 31. Kf5 Kc4 32. Ke6 Kxb4 33. Kf7 Kc3 34. Kxg7 Kxc2 35. Kxh7 b4 36. h6 b3 37. Kg7 b2 38. h7 b1=Q 39. h8=Q Qg1+ 40. Kf7) 31. Kg4? { (1.66 → -0.03) Mistake. The best move was Ke4. } (31. Ke4 Ke7 32. Kd4 g5 33. hxg6 h5 34. c4 h4 35. g7 Kf7 36. cxb5 h3 37. b6 h2) 31... g6 32. f4? { (-0.38 → -2.70) Mistake. The best move was hxg6+. } (32. hxg6+ Kxg6 33. Kf4 Kf7 34. Kg4 Ke6 35. Kh5 Kd5 36. Kh6 Kc4 37. f4 Kxb4 38. f5 Kc3 39. Kg7 h5 40. Kxf6 h4 41. Ke5 h3) 32... Kg7? { (-2.70 → -0.06) Mistake. The best move was gxh5+. } (32... gxh5+ 33. Kxh5 Ke6 34. Kh6 Kf5 35. Kg7 h5 36. c4 bxc4 37. b5 Ke6 38. b6 Kd6 39. Kxf6 Kc6 40. b7) 33. f5? { (-0.06 → -1.40) Mistake. The best move was hxg6. } (33. hxg6 hxg6 34. Kf3 g5 35. fxg5 fxg5 36. c4 bxc4 37. b5 c3 38. Ke3 c2 39. Kd2 g4 40. b6 g3 41. b7 g2 42. Kxc2 g1=Q) 33... gxf5+? { (-1.40 → 0.00) Mistake. The best move was g5. } (33... g5 34. Kf3 Kf7 35. Ke4 Ke7 36. Kd4 Kd6 37. h6 g4 38. Ke4 Kc6 39. Kf4 Kd5 40. Kxg4 Kc4 41. Kf3 Kxb4 42. Ke2 Kc3 43. Kd1) 34. Kxf5 Kh6?? { (0.00 → 49.21) Blunder. The best move was Kf7. } (34... Kf7 35. Ke4 Ke6 36. Kd4 Kd6 37. c4 bxc4 38. Kxc4 Kc6 39. b5+ Kb6 40. h6 f5 41. Kb4 f4 42. Kc4 f3 43. Kd3 Kxb5 44. Ke3) 35. Ke6?? { (49.21 → -0.55) Blunder. The best move was Kxf6. } (35. Kxf6 Kxh5 36. Kf5 h6 37. c4 bxc4 38. Ke4 Kg4 39. b5 c3 40. Kd3 c2 41. Kxc2 Kh5 42. b6 Kg6 43. b7 Kg5 44. b8=Q Kf5) 35... f5?? { (-0.55 → 49.07) Blunder. The best move was Kxh5. } (35... Kxh5 36. Kf5 Kh4 37. Ke4 h5 38. c4 bxc4 39. Kd4 f5 40. b5 f4 41. b6 f3 42. Ke3 c3 43. b7 c2 44. b8=Q c1=Q+ 45. Kxf3) 36. Kxf5 Kxh5 37. Ke5?? { (121.52 → 0.00) Blunder. The best move was c4. } (37. c4 bxc4 38. Ke4 c3 39. Kd3 Kg4 40. b5 c2 41. Kxc2) 37... Kg5 38. Kd5?? { (0.00 → -50.58) Blunder. The best move was Kd4. } (38. Kd4 Kf6 39. c4 bxc4 40. Kxc4 Ke6 41. b5 Kd6 42. Kd4 h5 43. Kd3 Kc5 44. Ke3 Kxb5 45. Kf2 Kc5 46. Kg3 Kd5 47. Kf4 h4) 38... h5 39. Kc5 h4 40. Kxb5 h3 41. c4?! { (-98.35 → Mate in 22) Checkmate is now unavoidable. The best move was Ka6. } (41. Ka6 h2 42. c4 h1=Q 43. Kb6 Kf5 44. c5 Ke5 45. b5 Qa8 46. Kc7) 41... h2 42. c5 h1=Q 43. c6 Qf1+ 44. Ka5 Qf5+ 45. b5 Qc8 46. Kb6 Qb8+ 47. Kc5 Qe5+ 48. Kb6 Qb8+ 49. Kc5 Qc8 50. b6 Kf6 51. Kb5 Qf5+ 52. Ka6 Qc8+ 53. b7 Qxc6+ 54. Ka7 Qc7 55. Ka8 Ke7?? { (Mate in 3 → 0.00) Lost forced checkmate sequence. The best move was Qa5+. } (55... Qa5+ 56. Kb8 Ke7 57. Kc8 Qd8#) 56. b8=Q Qxb8+ 57. Kxb8 { Draw } 1/2-1/2
 +
</pgn>
 +
 +
== Carlos (1038) vs Fabrice (1091) ==
 +
 +
The game was also lost by the person who tracked the move on the phone.
 +
 +
== Stefan (1003) vs David (1013) ==
 +
 +
http://en.lichess.org/syWmuxEW/
 +
 +
== David (1029) vs Pablo (912) ==
 +
 +
http://en.lichess.org/oUGetivi#63
 +
 +
== David (1040) vs Amir (967) ==
 +
 +
http://en.lichess.org/yEcBVxtM
 +
 +
== Camilo (959) vs Fabrice (1073) ==
 +
 +
http://en.lichess.org/0fN8aE5z
 +
 +
== Amir vs Camilo ==
 +
 +
http://en.lichess.org/0kRUAZXN
 +
 +
== Camilo vs Pablo ==
 +
 +
http://en.lichess.org/yZugSDXp
 +
 +
== Santiago vs Stefan ==
 +
 +
http://en.lichess.org/kyHI7xkj
 +
 +
== Santiago vs Amir ==
 +
 +
http://en.lichess.org/3NbsLB54
 +
 +
== David vs Camilo ==
 +
 +
http://en.lichess.org/sEABC9kP
 +
 +
== Amir vs Fabrice ==
 +
 +
The game was lost by the person recording it (Pablo). Fabrice won.
 +
 +
== Stefan vs Camilo ==
 +
 +
http://en.lichess.org/PNFUlY0U
 +
 +
== Amir vs Javier ==
 +
 +
http://en.lichess.org/Mle0Ku4U
 +
 +
== Amir vs David ==
 +
 +
http://en.lichess.org/KwgSxKcE
 +
 +
== Pablo vs Amir ==
 +
 +
http://en.lichess.org/1YCYh0v1
 +
 +
== Javier vs Fabrice ==
 +
 +
http://en.lichess.org/dnFuLh04
 +
 +
== Fabrice vs Camilo ==
 +
 +
http://en.lichess.org/CmYwEBYb
 +
 +
(missing some games)
 +
 +
== Fabrice (12:21) vs Pablo (15:00) ==
 +
 +
http://en.lichess.org/AC9LYlET
 +
 +
== Camilo (15:00) vs Javier (13:7) ==
 +
 +
http://en.lichess.org/WrtcO1vg
 +
 +
== Fabrice (10:00) vs Amir (15:00) ==
 +
 +
http://en.lichess.org/oXIWacPF
  
 
= Games to come =
 
= Games to come =

Latest revision as of 07:53, 26 March 2021

Contents

PolaChess

The PolaChess tournament was the PolaFlow chess tournament that we entertained while working as a funded scientific group at the Universidad Autónoma de Madrid. It was a Round-robin, 15 minutes time, 0 increment tournament played during coffee time. Both a PolÆlO rating and centipawns were computed. The person in charge was Juan Pablo.

Polachess-first-game.jpeg

PolÆlO

An Elo is computed, with a $K=32$ constant and with 5 provisional ratings for players not part of the PolaChess pool (we assumed established ratings for everybody who joined the tournament at $t=0$, which is not a problem as their ratings will converge but we need to take into account occasional games as provided by visitors). Specifically, the $K$ factor is scaled by $3/\big(4(5-i)\big)$ (i.e., down) for the established player and by $3-(i-1)/2$ (i.e., up) for his opponent for the first $i<5$ games of the new player, after which point $K=32$ again. Explicitly, the $K$ constants for the new player go:

96, 80, 64, 48, and 32 thereafter

while it goes, for the established player:

6, 8, 12, 24, and 32 thereafter

Games

Carlos (1000) vs Camilo (1000)

13 February (2015)

Fabrice (1000) vs David (1000)

16 February (2015)

Carlos (1016) vs Stefan (1000)

17 February (2015) (photo)

Pablo (1000) vs Fabrice (1016)

18 February (2015)

Carlos (1031) vs Santiago (1000)

Camilo (984) vs Stefan (985)

David (984) vs Carlos (1046)

23 February (2015) — Blunderful.

Stefan (1001) vs Pablo (985)

Santiago (985) vs David (1003)

Pablo (970) vs David (1018)

David (1032) vs Fabrice (1031)

Fabrice (1047) vs Stefan (1016)

The end was not recorded as it was too fast for the transcript (Pablo). Apparently an illegal move was made with a rook. The game ended in checkmate in a race to flag for time.

David (1016) vs Stefan (1001)

Fabrice (1062) vs Carlos (1027)

Pablo (956) vs Camilo (968)

Camilo wins on time. Interestingly, 24. Qd6+?! is not a blunder (only a mistake). The next move, however, is a proper queen panick moment.

Stefan (1018) vs Fabrice (1076)

The end was not recorded as it was too fast for the transcript (Pablo). The game ended in checkmate shortly after the last position shown.

Santiago (970) vs Camilo (983)

Shortest game so far, which left us time to play a king of the hill variation (which Camilo won, against Fabrice, by checkmate on a too daring king).

Pablo (941) vs Santiago (987)

In a raging fury against our Colombian community, Santiago proceeds to calmly walk his way back up the ladder of the tournament, methodically resisting the attacks of White who, in their traditional style, succumb to their own pressure and split out to surrender their queen on an otherwise leading position. The shat queen moment—this move of the game where Juan Pablo becomes chess-blind and positions his dame in front of a pawn, bishop or right below the roofs of a knight—occurred here on the (Friday the) 13th move. It was then just a matter of carefully moving the heavy Black artillery left around, with little but enough time left to enforce checkmate. Playing with psychology on his side, Santiago allowed himself the occasional glance through the window, à la Bobby, which was a nice touch.

Camilo (966) vs David (999)

A game of tension, of tension going too far. First 10 moves or so have been slowly, carefully considered by both sides and getting the pot to almost boiling point. Then David blunders his queen away, 11. Bd3?? Even then, to strike mercilessly, Camilo took his time, and brought the heavy knight falling with all the weight of an actual horse on the square that meant defeat for our French contender. But there's nothing that you can do to vex David's attitude. He regarded this move as mere trifle, displaced his king and carried on with a face of steel. Time was still equal. But with time passing and nothing to loose, it was easy for Black to arrogantly pretend they could still play, and with the face of conquest, advance a minuscule little pawn towards recovering the wasted queen. White started to play faster (which is good) and with too much confidence (which is not), with some irrational fixation on delivering check. See 22. Qc4+?, letting the knight go away. At this point, or not too far, a girl who popped out of nowhere tried to get under the table to reach something below Camilo's bench. Upon inquiry, and thankfully, it turned out to be only for a coin that rolled all the way from the vending machine to our competitor. We had to pay the girl to go away. Too late. On 26th move, the blunder of the day changed the game's fate. In a mate-in-5 position, when everybody started to relax and think about the coin below the bench, Camilo spin out of control: first sacrifice of a bishop, 26. Bxa6+? then throwing the queen in its wake, 27 Qxa6+?? The move was stopped in mid-air, in a frozen time and space with only a resounding "too late, too late" from David, detonating in a cafetaria getting a moment's interest into an apparent scandal. Then in time trouble, psychologically ruined, pursuing illusory checkmates through pointless checks, only defeat could follow for White, who lost on time.

Fabrice (1089) vs Javier (1000)

We have a new player, Javier, also the strongest one (playing in a club), so this is great news for our competition. Javier enters with the provisional rating rules, so his rating changes a lot, sinking to 964 as he lost the game, while Fabrice's (yours truly, writing this comment) changes little, winning only 2 points in what was the most difficult game so far. Actually the game was a win for Black, who had a mate position in move 31. Qg4# Chess being a game where a single mistake can overturn everything, since 31. g6+?? was played instead, a Berezina was turned into a Campo Formio. A mate had been announced, and as I had seen the mate with queen, I accepted the claim as valid, but the Referee (Pablo) observed this was not checkmate, so the game carried on, and after forcing the exchange of queens, Black was in the mental despair situation and did not try to fight against the rook. A careless knight move led to his capture on discovering a check, and Black resigned. This is a victory from a lost game. But aren't many victories like that? (especially when involving French players?) Like this, everybody's a winner: the good chess player, who loses on a blunder and the loser, who wins as a patzer. To make things worst, on move 15. a super-castling 15. O-O-O-O was attempted, conveniently getting the king on d1, but of course the referee objected, and everybody laughed his ass off, not letting me add another quantum move up my sleeve of illegal tricks. Still, the game continued.

The main feature of the game as far as I am concerned is my move 7. c3?? which the audience took for what it was: a blunder, but assuming a stupid oversight, while it was really a gambit. Which one? This is the variation I had in mind (you can play it in the game below as the 2nd variation):

7. Nh2 h6xg5 (opening the column)
8. h4xg5 (menacing to take back the sacrificed piece)

The knight has ultimately to move, leaving the Black king naked to an attack from the White queen supported by the king's bishop, and pinned by the White king's bishop. This leads to aggressive attack that, in time battle, may be worth the small loss in material. I'm fairly sure in the queenside castle of Black, this provides an actual advantage (my experience is that strong players tend to reject this gambit). Here, though, the knight was in the way, Javier is a good player, so he had time to develop his pieces to turn this hurried and lame attack into a sound counter-attack. In fact, even if I hadn't shat the horse in the middle, this was a mistake, since, so the computer analyzes:

8. ... d5 (exchanging knight for bishop)
9. Bb3 (holding the pin) Nh7 (keeping the knight)
10. g6

The queen still looks dangerous but the analysis shows that it's still better for Black.

Stefan (1005) vs Amir (1000)

Another new player, Amir Rahmani, joined the tournament to defend the colors of Isfahan against Stefan who took a bye from our club player till Wednesday. A strange opening and a dangerous unconvering of the king-side let Stefan, who was mentally and physically preparing himself to destroy Javier, have an easy win. Tomorrow, Amir vs Juan Pablo. Bets are opened. Will the "shat queen" get in the way of another assured victory? Or will Amir toy again with irregular openings?

Amir (953) vs Juan Pablo (927)

A late PolaChess session today, since Amir was looking for his new place to live (which he found, by the way). Everybody was expecting a bold queen sacrifice from Juan Pablo, which, not disappointingly, duly came on precisely the traditional 12th move. We let you discover this fantastic queen blunder of majestic proportion which, as it should to have all its savor, was played on a strong, if not winning, position.

Polachess-17March2015.jpeg

Stefan (1008) vs Javier (964)

A tense game with a leading White who started to make little mistakes then bigger mistakes then a fatal mistake that let Black recover from a lost piece to a winning position. The message here is: Javier can blunder, so he's reachable, but only once, so remain careful.

Camilo (952) vs Amir (990)

An equilibrated game, that Black loses on time, allowing not to be mated next move, although the mating position had already occured. A couple of times, the battle swung back to a possible win for both sides and even came to a nice confrontation of strong positional advantage against strong material advantage after 19. dxc4??, although the last attack from Camilo, stabbing the rook, was a decisive one. Interestingly, 17. Rxe6+ (where even a mate was announced) is not a mistake, as it allows to pursue the same idea with the other rook, which did not happen in the game, illustrating again how weak is the move that follows a supposed mistake on the board. White wins 7 points, Black looses 35 in this provisional game.

Amir (955) vs Santiago (1001)

Amir (982) vs Carlos (1013)

Carlos (1028) vs Pablo (923)

Lost on time but lost strategically as well from a too nervous Black who let White come back.

Carlos (1039) vs Javier (1009)

The PolaChess game of the century. So crazy, its records got lost and the game had to be reconstructed from scratch and sheer efforts of the memory. Our first draw of the tournament with a dispute on whether Black was flagged on time (which couldn't be since White moved last anyway, leaving two naked kings on the board). Black, at the same time, had a mate in 29 moves on the 40th one. But not enough time, not enough concentration, time flew away as the queen promoted and an ultimate embrace of the king and queen of two colors led to a shouting sequence in the cafeteria. Dust settled down, agreement was reached, Black got 5 little points out of it, White lost one.

Carlos (1038) vs Fabrice (1091)

The game was also lost by the person who tracked the move on the phone.

Stefan (1003) vs David (1013)

http://en.lichess.org/syWmuxEW/

David (1029) vs Pablo (912)

http://en.lichess.org/oUGetivi#63

David (1040) vs Amir (967)

http://en.lichess.org/yEcBVxtM

Camilo (959) vs Fabrice (1073)

http://en.lichess.org/0fN8aE5z

Amir vs Camilo

http://en.lichess.org/0kRUAZXN

Camilo vs Pablo

http://en.lichess.org/yZugSDXp

Santiago vs Stefan

http://en.lichess.org/kyHI7xkj

Santiago vs Amir

http://en.lichess.org/3NbsLB54

David vs Camilo

http://en.lichess.org/sEABC9kP

Amir vs Fabrice

The game was lost by the person recording it (Pablo). Fabrice won.

Stefan vs Camilo

http://en.lichess.org/PNFUlY0U

Amir vs Javier

http://en.lichess.org/Mle0Ku4U

Amir vs David

http://en.lichess.org/KwgSxKcE

Pablo vs Amir

http://en.lichess.org/1YCYh0v1

Javier vs Fabrice

http://en.lichess.org/dnFuLh04

Fabrice vs Camilo

http://en.lichess.org/CmYwEBYb

(missing some games)

Fabrice (12:21) vs Pablo (15:00)

http://en.lichess.org/AC9LYlET

Camilo (15:00) vs Javier (13:7)

http://en.lichess.org/WrtcO1vg

Fabrice (10:00) vs Amir (15:00)

http://en.lichess.org/oXIWacPF

Games to come

Based on Computer's random sampling. Games that cannot take place are either skipped of flushed to the end.

Decided at the last minute on people's availability.

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