m (→‎Camilo (966) vs David (999))
(First game of Javier in PolaChess)
Line 436: Line 436:
  
 
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>
 +
 +
== Fabrice (1089) vs Javier (1000) ==
 +
 +
We have a new player, Javier, also the stronger 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 are like that. 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. O-O-O-O a super-castling was attempted, conveniently getting the king d1, but of course the referee objected, and everybody laughed his ass off, adding 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:
 +
 +
: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 fairy sure in the queenside castle of Black, this provides an actual advantage (my experience is that strong players tend to reject this gambit). Here thought the knight was in the way, Javier is a good player, so he had time to develop his pieces to turn this hurried attack into a 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 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>
 
</pgn>
  

Revision as of 18:18, 13 March 2015

Contents

PolaChess

The PolaChess tournament is the ongoing PolaFlow chess tournament. It is a Round-robin, 10 minutes time, 0 increment tournament played during coffee time. Both a PolÆlO rating and centipawns are computed. The person in charge is Carlos.

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)

Santiago (1000) vs Carlos (1031)

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).

Santiago (987) vs Pablo (941)

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 stronger 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 are like that. 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. O-O-O-O a super-castling was attempted, conveniently getting the king d1, but of course the referee objected, and everybody laughed his ass off, adding 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:

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 fairy sure in the queenside castle of Black, this provides an actual advantage (my experience is that strong players tend to reject this gambit). Here thought the knight was in the way, Javier is a good player, so he had time to develop his pieces to turn this hurried attack into a 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 better for Black.

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.

Retrieved from "http://laussy.org/index.php?title=PolaChess&oldid=15230"