Gambit match Stockfish vs Komodo

[Jeroen]

Match conditions:

Total number of games = 40
Hardware = Core i7, both engines use 4 CPU's
Time control = game in 30 minutes, no increment
Tablebases = no
Ponder = off
Openings = 20 selected lines from GambitLines.ctg, 10 start with 1.e4, 10 start with 1.d4/1.Nf3/1.f4

All details and games can be found here:

http://rybkaforum.net/cgi-bin/rybkaforu ... ?tid=30303

[jdart]

Interesting. 7. e4 is another big line in the Benko: maybe better than 7. Nf3.

--Jon

[Ajedrecista]

Hello Jon:

Interesting. 7. e4 is another big line in the Benko: maybe better than 7. Nf3.

--Jon

Here are some lines of 7. e4 variant, extracted from volume A of the Encyclopedia of Chess Openings (ECO), (C) Copyright 1979 by Chess Informant, Beograd - Jugoslavija.

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Vladimir Tukmakov (Jugoslavija).

[A 58] 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6

1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 g6 6. Nc3 Bg7 7. e4 d6 8. Nf3 [4] O-O 9. h3 [5] Qb6 [6] 10. Be2 Bxa6 11. O-O Nbd7 12. Re1 Rfb8 13. Rb1 Ne8 [7] (white stands slightly better).

[4] 8. Qa4+!? Bd7 9. Qc2 O-O 10. Nf3 Qb6 11. Be2 Nxa6 12. O-O Nc7 13. Re1 Rfb8 14. Rb1 [Vaganjan - Parma, SSSR - Jugoslavija 1972] Nb5! (the position is unclear).
[4] 8. f4!?

[5] 9. Be2 - E 91 {I do not know if it refers to ECO E91}.

[6] 9... Nfd7?! 10. Be2 Bxa6 11. O-O Qb6 12. Re1 Rc8 13. Qc2 Bxe2 14. Rxe2 Na6 15. Bf4 (white has the upper hand). Gligoric - Udovcic, Jugoslavija (championship) 1953.

[7] 14. Bd2 Nc7 15. b3 (white stands slightly better). Pachman - Bellon, Haifa (olympiad) 1976 - chess informant 22/141.

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Vladimir Tukmakov (Jugoslavija).

[A 59] 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 Bxa6 6. Nc3 d6 7. e4

1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 Bxa6 6. Nc3 d6 7. e4 Bxf1 [1] 8. Kxf1 g6 9. Nge2 [2] Bg7 10. g3 [3] O-O 11. Kg2 Qb6 12. Rb1 [4] Na6 [5] 13. b3 Nc7 14. f3 e6 15. dxe6 fxe6 [6] (the position is unclear).

[1] 7... g6 8. Bxa6 Nxa6 9. Nf3 Bg7 10. O-O O-O 11. Bf4 [11. Nd2 - A 58] Nd7 Qd2 (white stands slightly better).

[2] 9. g4?! Bg7 10. g2 [10. f3 O-O 11. Nge2 e6! 12. Kg2 exd5 13. Nxd5 Nc6 14. Nec3 Nxd5 15. exd5 Nb4 16. h4 f5 (black has the upper hand). Visier - Benkö, Málaga 1969] O-O 11. h3 e6 12. Nge2 [12 dxe6 fxe6 13. e5 Ne8 14. exd6 Nxd6 15. Qe2 Qd7 16. f4 Nc6 17. Nf3 Nd4 (black has the upper hand). Avram - Benkö, USA 1968] exd5 13. exd5 Nbd7 (with compensation for the material).
[2] 9. Bf4!? Bg7 10. Qd2 Qb6 11. Rb1 Ng4 12. h3 Ne5 13. Bh6 [Möhring - H. Grünberg, DDR (championship) 1973] Nc4 (the position is unclear).

[3] 10. Nf4?! O-O 11. g4 Na6 [11... h6 12. h4 Nfd7 (the position is unclear). Benkö] 12. h4 Qa5 13. h5 Rfb8 14. hxg6 hxg6 15. g5 Nd7 16. Qg4 Ne5 17. Qh3 Nb4 18. Kg2 Qa6 19. Qh7+ Kf8 20. Rh3 Nc2 (black has the upper hand). Formanek - Browne, USA 1970; 12... Qc8!?
[3] 10. h3 O-O 11. Kg1 Qb6 12. Rb1 Na6 13. Be3 [Enklaar - Ree, Nederland (championship) 1972] e6!? (black stands slightly better); 11... Qa5!?

[4] 12. Qc2?! Na6 13. a4 Nb4 14. Qb1 Nd7 (black has the upper hand). Polenek - Despotovic, correspondence game 1975.

[5] 12... Nbd7 13. Qc2 Rfb8 14. h3 Ne5 15. b3 Qa6 (with compensation for the material). Kozlovska - Bilunova, SSSR 1972.

[6] 16. Be3 Qc6 17. b4 [17. Qd2?! d5 (black has the upper hand). Gross - Benkö, USA 1968] cxb4 18. Rxb4 (the position is unclear).

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There are more lines in this volume (8. Nf3 and 8. g3 mainly) but I do not have enough time for typing them. I hope no typos.

Regards from Spain.

Ajedrecista.

[jdart]

That is very old theory: most of the developments in the Benko are 80's and later.

--Jon

[Graham Banks]

That is very old theory: most of the developments in the Benko are 80's and later.

--Jon

Perhaps the original ECO was 1979. I'm pretty sure there would have been an updated version since then?

[carldaman]

That is very old theory: most of the developments in the Benko are 80's and later.

--Jon

Perhaps the original ECO was 1979. I'm pretty sure there would have been an updated version since then?

Indeed there have been updated volumes, but the irony is that these are not held in high regard - despite being more up-to-date, they are considered to be database dumps, whereas the original ECO volumes were meticulously prepared by strong GMs. Strange world we live in.

Regards,
CL