interesting King's Gambit game

[jdart]

Rybka 3 thinks Black is ahead for quite a while, but certainly by 23. Nf5! White is winning. Black should probably have deviated much earlier: maybe with 18. .. d5, since exd5 is met with Nd3+.

[Event "?"]
[Site "chessclub.com"]
[Date "2009.09.15"]
[Round "?"]
[White "Data"]
[Black "Arasan 11.5"]
[Result "1-0"]
[ECO "C34"]
[WhiteElo "2870"]
[BlackElo "2729"]
[TimeControl "240+16"]

1. e4 e5 2. f4 exf4 3. Nf3 d6 4. d4 g5 5. h4 g4 6. Ng1 Qf6 7. Nc3 Ne7
8. Nge2 Bh6 9. Qd2 Nbc6 10. Nb5 Kd8 11. d5 Ne5 12. Qa5 b6 13. Qc3 c6
14. dxc6 N7xc6 15. Qa3 f3 16. Bg5 Bxg5 17. hxg5 Qe7 18. Nf4 Bd7
19. Nxd6 fxg2 20. Bxg2 Qxg5 21. Nd5 Rb8 22. Rd1 Qg7 23. Nf5 Bxf5
24. exf5 Nd7 25. O-O Rb7 26. Ne7 Nxe7 27. f6 Qf8
1-0 {ArasanX resigns}

[bob]

Rybka 3 thinks Black is ahead for quite a while, but certainly by 23. Nf5! White is winning. Black should probably have deviated much earlier: maybe with 18. .. d5, since exd5 is met with Nd3+.

[Event "?"]
[Site "chessclub.com"]
[Date "2009.09.15"]
[Round "?"]
[White "Data"]
[Black "Arasan 11.5"]
[Result "1-0"]
[ECO "C34"]
[WhiteElo "2870"]
[BlackElo "2729"]
[TimeControl "240+16"]

1. e4 e5 2. f4 exf4 3. Nf3 d6 4. d4 g5 5. h4 g4 6. Ng1 Qf6 7. Nc3 Ne7
8. Nge2 Bh6 9. Qd2 Nbc6 10. Nb5 Kd8 11. d5 Ne5 12. Qa5 b6 13. Qc3 c6
14. dxc6 N7xc6 15. Qa3 f3 16. Bg5 Bxg5 17. hxg5 Qe7 18. Nf4 Bd7
19. Nxd6 fxg2 20. Bxg2 Qxg5 21. Nd5 Rb8 22. Rd1 Qg7 23. Nf5 Bxf5
24. exf5 Nd7 25. O-O Rb7 26. Ne7 Nxe7 27. f6 Qf8
1-0 {ArasanX resigns}

"Data" has been cooking up this book for years. Each time he loses or draws, he manually tweaks the book. As black, don't play 1. ... e5 in important games and this becomes moot.

[Dann Corbit]

Rybka 3 thinks Black is ahead for quite a while, but certainly by 23. Nf5! White is winning. Black should probably have deviated much earlier: maybe with 18. .. d5, since exd5 is met with Nd3+.

[Event "?"]
[Site "chessclub.com"]
[Date "2009.09.15"]
[Round "?"]
[White "Data"]
[Black "Arasan 11.5"]
[Result "1-0"]
[ECO "C34"]
[WhiteElo "2870"]
[BlackElo "2729"]
[TimeControl "240+16"]

1. e4 e5 2. f4 exf4 3. Nf3 d6 4. d4 g5 5. h4 g4 6. Ng1 Qf6 7. Nc3 Ne7
8. Nge2 Bh6 9. Qd2 Nbc6 10. Nb5 Kd8 11. d5 Ne5 12. Qa5 b6 13. Qc3 c6
14. dxc6 N7xc6 15. Qa3 f3 16. Bg5 Bxg5 17. hxg5 Qe7 18. Nf4 Bd7
19. Nxd6 fxg2 20. Bxg2 Qxg5 21. Nd5 Rb8 22. Rd1 Qg7 23. Nf5 Bxf5
24. exf5 Nd7 25. O-O Rb7 26. Ne7 Nxe7 27. f6 Qf8
1-0 {ArasanX resigns}

"Data" has been cooking up this book for years. Each time he loses or draws, he manually tweaks the book. As black, don't play 1. ... e5 in important games and this becomes moot.

My database has e6 as the best move here. What does crafty play?
[d]rnbqkbnr/pppppppp/8/8/4P3/8/PPPP1PPP/RNBQKBNR b KQkq - acd 23; acn 506885582; acs 2813; bm e6; ce -16; pm e6; pv e6 d4 d5 Nc3 Nf6 Bg5 dxe4 Nxe4 Be7 Bxf6 gxf6 Qd3 e5 Ne2 Nc6 O-O-O exd4 c3 f5 N4g3 Qd5 Nxd4 Nxd4 Qxd4 Qxd4 Rxd4 Be6;

[Dann Corbit]

Rybka 3 thinks Black is ahead for quite a while, but certainly by 23. Nf5! White is winning. Black should probably have deviated much earlier: maybe with 18. .. d5, since exd5 is met with Nd3+.

[Event "?"]
[Site "chessclub.com"]
[Date "2009.09.15"]
[Round "?"]
[White "Data"]
[Black "Arasan 11.5"]
[Result "1-0"]
[ECO "C34"]
[WhiteElo "2870"]
[BlackElo "2729"]
[TimeControl "240+16"]

1. e4 e5 2. f4 exf4 3. Nf3 d6 4. d4 g5 5. h4 g4 6. Ng1 Qf6 7. Nc3 Ne7
8. Nge2 Bh6 9. Qd2 Nbc6 10. Nb5 Kd8 11. d5 Ne5 12. Qa5 b6 13. Qc3 c6
14. dxc6 N7xc6 15. Qa3 f3 16. Bg5 Bxg5 17. hxg5 Qe7 18. Nf4 Bd7
19. Nxd6 fxg2 20. Bxg2 Qxg5 21. Nd5 Rb8 22. Rd1 Qg7 23. Nf5 Bxf5
24. exf5 Nd7 25. O-O Rb7 26. Ne7 Nxe7 27. f6 Qf8
1-0 {ArasanX resigns}

"Data" has been cooking up this book for years. Each time he loses or draws, he manually tweaks the book. As black, don't play 1. ... e5 in important games and this becomes moot.

My database has e6 as the best move here. What does crafty play?
[d]rnbqkbnr/pppppppp/8/8/4P3/8/PPPP1PPP/RNBQKBNR b KQkq - acd 23; acn 506885582; acs 2813; bm e6; ce -16; pm e6; pv e6 d4 d5 Nc3 Nf6 Bg5 dxe4 Nxe4 Be7 Bxf6 gxf6 Qd3 e5 Ne2 Nc6 O-O-O exd4 c3 f5 N4g3 Qd5 Nxd4 Nxd4 Qxd4 Qxd4 Rxd4 Be6;

The alternative evals record contains:
rnbqkbnr/pppppppp/8/8/4P3/8/PPPP1PPP/RNBQKBNR b KQkq - pm c5;

So I guess that those are pretty well the two best moves for response to e4.

Statistically (from a database of high quality games) the most frequent responses were:
Na6 {3} Nc6 {283} Nf6 {636} a6 {1} b6 {74} c5 {38599} c6 {6652} d5 {720} d6 {1536} e5 {20915} e6 {9312} g5 {4} g6 {890}

[Eelco de Groot]

Rybka 3 thinks Black is ahead for quite a while, but certainly by 23. Nf5! White is winning. Black should probably have deviated much earlier: maybe with 18. .. d5, since exd5 is met with Nd3+.

[Event "?"]
[Site "chessclub.com"]
[Date "2009.09.15"]
[Round "?"]
[White "Data"]
[Black "Arasan 11.5"]
[Result "1-0"]
[ECO "C34"]
[WhiteElo "2870"]
[BlackElo "2729"]
[TimeControl "240+16"]

1. e4 e5 2. f4 exf4 3. Nf3 d6 4. d4 g5 5. h4 g4 6. Ng1 Qf6 7. Nc3 Ne7
8. Nge2 Bh6 9. Qd2 Nbc6 10. Nb5 Kd8 11. d5 Ne5 12. Qa5 b6 13. Qc3 c6
14. dxc6 N7xc6 15. Qa3 f3 16. Bg5 Bxg5 17. hxg5 Qe7 18. Nf4 Bd7
19. Nxd6 fxg2 20. Bxg2 Qxg5 21. Nd5 Rb8 22. Rd1 Qg7 23. Nf5 Bxf5
24. exf5 Nd7 25. O-O Rb7 26. Ne7 Nxe7 27. f6 Qf8
1-0 {ArasanX resigns}

I don't think 18... d5 would have impressed Data very much because of something like 19. Dxe7+ Kxe7 20.Pxd5+ or 19...Pxe7 20.exd5 both of which seem winning, but this is just my own analysis, not checked. Ancalagon thinks that Black would have been okay however if he plays 18... Ng6:


[d]r1bk3r/p3qp1p/1pnp4/1N2n1P1/4PNp1/Q4p2/PPP3P1/R3KB1R b KQ -

Engine: Ancalagon 1.3 Weak Squares 180 Board Control middlegame 50 endgame 50
Build 298 (Athlon 2009 MHz, 256 MB) by Romstad, Costalba, Kiiski, de Groot

2.00 0:01 +0.29 18...fxg2 19.Bxg2 Nc4 20.Qb3 N6e5
21.Nd5 Qxg5 22.O-O (420.774) 332

3.01 0:51 +0.21 18...fxg2 19.Bxg2 Nc4 20.Qc3 N6e5
21.O-O Qxg5 22.Nd5 (24.210.245) 469

3.13 0:52 +0.74 18...Ng6 19.O-O-O Nxf4 20.Rxd6+ Bd7
21.gxf3 gxf3 22.Qxf3 Qxg5 (24.725.382) 468

4.01 1:34 +0.54 18...Ng6 19.Qxd6+ Qxd6 20.Nxd6 Nxf4
21.Nxf7+ Ke8 22.Nxh8 fxg2 23.Bxg2 Nxg2+
24.Kf2 Nf4 25.Rxh7 Nh3+ 26.Ke2 Ba6+
27.Ke3 Nxg5 (43.670.555) 460

5.01 1:56 +0.27 18...Ng6 19.Qe3 Nxf4 20.Qxf4 Qe5
21.Qxe5 Nxe5 22.O-O-O Bd7 23.gxf3 Nxf3
24.Nxd6 Nxg5 (53.164.825) 455

6.01 2:23 +0.17 18...Ng6 19.Qe3 Nxf4 20.Qxf4 Qe5
21.Qxe5 Nxe5 22.O-O-O Bd7 23.gxf3 Nxf3
24.Nxd6 Nxg5 (65.096.347) 452

7.01 4:20 -0.60 18...Ng6 19.O-O-O Nxf4 20.Qc3 Ne5
21.Nxd6 Nfd3+ 22.Rxd3 Nxd3+ 23.Qxd3 Qxg5+
24.Kb1 Ke7 25.gxf3 Rd8 26.e5 Qxe5 (113.887.636) 436

8.01 23:37 -0.52 18...Ng6 19.Qe3 Qe5 20.Nxg6 fxg6
21.Nxd6 Qg3+ 22.Qf2 Qxf2+ 23.Kxf2 fxg2
24.Kxg2 Be6 25.Rd1 Ke7 26.Nb5 Rac8
27.Kg3 Bxa2 28.b3 Nb4 29.Bc4 Rxc4
30.bxc4 Bxc4 31.Nxa7 (645.146.368) 455

9.01 103:20 -0.01 18...Ng6 19.Nxg6 Qxe4+ 20.Kf2 Qxg6
21.Qxd6+ Qxd6 22.Nxd6 Be6 23.gxf3 Ke7
24.Nc4 gxf3 25.Nd2 Nb4 26.c3 Rad8
27.Nxf3 Nd3+ 28.Bxd3 Rxd3 29.Rae1 a6 (2.587.515.956) 417

10.01 257:39 -0.23 18...Ng6 19.Qe3 Qe5 20.Nxg6 fxg6
21.Nxd6 Qg3+ 22.Qf2 Qxf2+ 23.Kxf2 Be6
24.Nb5 Ke7 25.Rd1 Ne5 26.Nd4 Bd7
27.gxf3 Raf8 28.f4 Rxf4+ 29.Ke3 Rf7
30.Rg1 Rhf8 31.Be2 (6.607.245.016) 427

I know, Ancalagon's branching factor is not very impressive. And only 15 replies are well checked, to save a little on CPU time, the rest much less, and I mean much, 6 plies or so less at the tenth iteration . 14 = LMRPVMoves = Full Depth Moves (PV Nodes) + 1 so that is a very arbitrary cut-off at the root already but the only way I could think to keep the plydepth acceptable with this scheme. I will have to think of something less risky.

If you don't believe me I have proof:

Code: Select all

Depth extraDepth = (RootMoveNumber <= LMRPVMoves ? OnePly + (Iteration >> 1)*OnePly: DEPTH_ZERO);

Don't show these lines to Anthony Cozzie I could hear him mumbling about the illiterate and unwashed masses trying to write chessprograms already..

Eelco

[jdart]

I think the interesting part of this game was post book. certainly for Arasan. Not sure about Data. It is a real test of king safety because both kings are exposed.

--Jon

[bob]

Rybka 3 thinks Black is ahead for quite a while, but certainly by 23. Nf5! White is winning. Black should probably have deviated much earlier: maybe with 18. .. d5, since exd5 is met with Nd3+.

[Event "?"]
[Site "chessclub.com"]
[Date "2009.09.15"]
[Round "?"]
[White "Data"]
[Black "Arasan 11.5"]
[Result "1-0"]
[ECO "C34"]
[WhiteElo "2870"]
[BlackElo "2729"]
[TimeControl "240+16"]

1. e4 e5 2. f4 exf4 3. Nf3 d6 4. d4 g5 5. h4 g4 6. Ng1 Qf6 7. Nc3 Ne7
8. Nge2 Bh6 9. Qd2 Nbc6 10. Nb5 Kd8 11. d5 Ne5 12. Qa5 b6 13. Qc3 c6
14. dxc6 N7xc6 15. Qa3 f3 16. Bg5 Bxg5 17. hxg5 Qe7 18. Nf4 Bd7
19. Nxd6 fxg2 20. Bxg2 Qxg5 21. Nd5 Rb8 22. Rd1 Qg7 23. Nf5 Bxf5
24. exf5 Nd7 25. O-O Rb7 26. Ne7 Nxe7 27. f6 Qf8
1-0 {ArasanX resigns}

"Data" has been cooking up this book for years. Each time he loses or draws, he manually tweaks the book. As black, don't play 1. ... e5 in important games and this becomes moot.

My database has e6 as the best move here. What does crafty play?
[d]rnbqkbnr/pppppppp/8/8/4P3/8/PPPP1PPP/RNBQKBNR b KQkq - acd 23; acn 506885582; acs 2813; bm e6; ce -16; pm e6; pv e6 d4 d5 Nc3 Nf6 Bg5 dxe4 Nxe4 Be7 Bxf6 gxf6 Qd3 e5 Ne2 Nc6 O-O-O exd4 c3 f5 N4g3 Qd5 Nxd4 Nxd4 Qxd4 Qxd4 Rxd4 Be6;

There are a ton of good choices. From e6 to d6 to d5 to Nf6 to c5 to c6 to you-name-it. e5 is also playable and crafty will play that on occasion although typically not in tournaments unless we have prepared something specific.

[bob]

Rybka 3 thinks Black is ahead for quite a while, but certainly by 23. Nf5! White is winning. Black should probably have deviated much earlier: maybe with 18. .. d5, since exd5 is met with Nd3+.

[Event "?"]
[Site "chessclub.com"]
[Date "2009.09.15"]
[Round "?"]
[White "Data"]
[Black "Arasan 11.5"]
[Result "1-0"]
[ECO "C34"]
[WhiteElo "2870"]
[BlackElo "2729"]
[TimeControl "240+16"]

1. e4 e5 2. f4 exf4 3. Nf3 d6 4. d4 g5 5. h4 g4 6. Ng1 Qf6 7. Nc3 Ne7
8. Nge2 Bh6 9. Qd2 Nbc6 10. Nb5 Kd8 11. d5 Ne5 12. Qa5 b6 13. Qc3 c6
14. dxc6 N7xc6 15. Qa3 f3 16. Bg5 Bxg5 17. hxg5 Qe7 18. Nf4 Bd7
19. Nxd6 fxg2 20. Bxg2 Qxg5 21. Nd5 Rb8 22. Rd1 Qg7 23. Nf5 Bxf5
24. exf5 Nd7 25. O-O Rb7 26. Ne7 Nxe7 27. f6 Qf8
1-0 {ArasanX resigns}

"Data" has been cooking up this book for years. Each time he loses or draws, he manually tweaks the book. As black, don't play 1. ... e5 in important games and this becomes moot.

My database has e6 as the best move here. What does crafty play?
[d]rnbqkbnr/pppppppp/8/8/4P3/8/PPPP1PPP/RNBQKBNR b KQkq - acd 23; acn 506885582; acs 2813; bm e6; ce -16; pm e6; pv e6 d4 d5 Nc3 Nf6 Bg5 dxe4 Nxe4 Be7 Bxf6 gxf6 Qd3 e5 Ne2 Nc6 O-O-O exd4 c3 f5 N4g3 Qd5 Nxd4 Nxd4 Qxd4 Qxd4 Rxd4 Be6;

The alternative evals record contains:
rnbqkbnr/pppppppp/8/8/4P3/8/PPPP1PPP/RNBQKBNR b KQkq - pm c5;

So I guess that those are pretty well the two best moves for response to e4.

Statistically (from a database of high quality games) the most frequent responses were:
Na6 {3} Nc6 {283} Nf6 {636} a6 {1} b6 {74} c5 {38599} c6 {6652} d5 {720} d6 {1536} e5 {20915} e6 {9312} g5 {4} g6 {890}

Hard to say, but as a human, I will likely play 1. e5 if you play e4. I don't think there is a "best move" at this early stage of the game. Depends on the kind of game you want to play and the kind of positions you like/dislike.

[Dr.Wael Deeb]

Rybka 3 thinks Black is ahead for quite a while, but certainly by 23. Nf5! White is winning. Black should probably have deviated much earlier: maybe with 18. .. d5, since exd5 is met with Nd3+.

[Event "?"]
[Site "chessclub.com"]
[Date "2009.09.15"]
[Round "?"]
[White "Data"]
[Black "Arasan 11.5"]
[Result "1-0"]
[ECO "C34"]
[WhiteElo "2870"]
[BlackElo "2729"]
[TimeControl "240+16"]

1. e4 e5 2. f4 exf4 3. Nf3 d6 4. d4 g5 5. h4 g4 6. Ng1 Qf6 7. Nc3 Ne7
8. Nge2 Bh6 9. Qd2 Nbc6 10. Nb5 Kd8 11. d5 Ne5 12. Qa5 b6 13. Qc3 c6
14. dxc6 N7xc6 15. Qa3 f3 16. Bg5 Bxg5 17. hxg5 Qe7 18. Nf4 Bd7
19. Nxd6 fxg2 20. Bxg2 Qxg5 21. Nd5 Rb8 22. Rd1 Qg7 23. Nf5 Bxf5
24. exf5 Nd7 25. O-O Rb7 26. Ne7 Nxe7 27. f6 Qf8
1-0 {ArasanX resigns}

"Data" has been cooking up this book for years. Each time he loses or draws, he manually tweaks the book. As black, don't play 1. ... e5 in important games and this becomes moot.

My database has e6 as the best move here. What does crafty play?
[d]rnbqkbnr/pppppppp/8/8/4P3/8/PPPP1PPP/RNBQKBNR b KQkq - acd 23; acn 506885582; acs 2813; bm e6; ce -16; pm e6; pv e6 d4 d5 Nc3 Nf6 Bg5 dxe4 Nxe4 Be7 Bxf6 gxf6 Qd3 e5 Ne2 Nc6 O-O-O exd4 c3 f5 N4g3 Qd5 Nxd4 Nxd4 Qxd4 Qxd4 Rxd4 Be6;

The alternative evals record contains:
rnbqkbnr/pppppppp/8/8/4P3/8/PPPP1PPP/RNBQKBNR b KQkq - pm c5;

So I guess that those are pretty well the two best moves for response to e4.

Statistically (from a database of high quality games) the most frequent responses were:
Na6 {3} Nc6 {283} Nf6 {636} a6 {1} b6 {74} c5 {38599} c6 {6652} d5 {720} d6 {1536} e5 {20915} e6 {9312} g5 {4} g6 {890}

Hard to say, but as a human, I will likely play 1. e5 if you play e4. I don't think there is a "best move" at this early stage of the game. Depends on the kind of game you want to play and the kind of positions you like/dislike.

I partialy agree here Bob because playing this,you have to know a hell of opening theory....one example:Ruy Lopez
Dr.D

[michiguel]

Rybka 3 thinks Black is ahead for quite a while, but certainly by 23. Nf5! White is winning. Black should probably have deviated much earlier: maybe with 18. .. d5, since exd5 is met with Nd3+.

[Event "?"]
[Site "chessclub.com"]
[Date "2009.09.15"]
[Round "?"]
[White "Data"]
[Black "Arasan 11.5"]
[Result "1-0"]
[ECO "C34"]
[WhiteElo "2870"]
[BlackElo "2729"]
[TimeControl "240+16"]

1. e4 e5 2. f4 exf4 3. Nf3 d6 4. d4 g5 5. h4 g4 6. Ng1 Qf6 7. Nc3 Ne7
8. Nge2 Bh6 9. Qd2 Nbc6 10. Nb5 Kd8 11. d5 Ne5 12. Qa5 b6 13. Qc3 c6
14. dxc6 N7xc6 15. Qa3 f3 16. Bg5 Bxg5 17. hxg5 Qe7 18. Nf4 Bd7
19. Nxd6 fxg2 20. Bxg2 Qxg5 21. Nd5 Rb8 22. Rd1 Qg7 23. Nf5 Bxf5
24. exf5 Nd7 25. O-O Rb7 26. Ne7 Nxe7 27. f6 Qf8
1-0 {ArasanX resigns}

"Data" has been cooking up this book for years. Each time he loses or draws, he manually tweaks the book. As black, don't play 1. ... e5 in important games and this becomes moot.

My database has e6 as the best move here. What does crafty play?
[d]rnbqkbnr/pppppppp/8/8/4P3/8/PPPP1PPP/RNBQKBNR b KQkq - acd 23; acn 506885582; acs 2813; bm e6; ce -16; pm e6; pv e6 d4 d5 Nc3 Nf6 Bg5 dxe4 Nxe4 Be7 Bxf6 gxf6 Qd3 e5 Ne2 Nc6 O-O-O exd4 c3 f5 N4g3 Qd5 Nxd4 Nxd4 Qxd4 Qxd4 Rxd4 Be6;

There are a ton of good choices. From e6 to d6 to d5 to Nf6 to c5 to c6 to you-name-it. e5 is also playable and crafty will play that on occasion although typically not in tournaments unless we have prepared something specific.

What makes e5 different from other possibilities in term of getting caught in a book trap (which is what I think you refer to)?
Fear of gambits?

Miguel