m (→Amir (982) vs Carlos (1013)) |
m (→Carlos (1028) vs Pablo (923)) |
||
| Line 611: | Line 611: | ||
== Carlos (1028) vs Pablo (923) == | == Carlos (1028) vs Pablo (923) == | ||
| + | |||
| + | <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> | ||
= Games to come = | = Games to come = | ||
Revision as of 17:15, 25 March 2015
PolaChess
The PolaChess tournament is the ongoing PolaFlow chess tournament. It is a Round-robin, 15 minutes time, 0 increment tournament played during coffee time. Both a PolÆlO rating and centipawns are computed. The person in charge is Juan Pablo.
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)
Fabrice (1000) vs David (1000)
Carlos (1016) vs Stefan (1000)
Pablo (1000) vs Fabrice (1016)
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 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.
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)
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.