Author: George Sobala
Date: 23:42:57 10/19/02
Thank you Christophe, for this engine. (But while I've got your attention - will
you PLEASE fix multivariation mode to allow proper analysis!)
ChessTiger15 set to Gambit Aggressive mode plays wonderful attacking chess. It
seizes the initiative - which many very "tactical" engines often fail to do.
Witness the game below. If you liked yesterdays Acs-van Wely game (sub-20 move
annihalation of a super GM), you will love this too. Gambit Tiger was running on
a mere K6-450, pille was using Fritz 6 on a much faster machine. Take time to
actually play through it: note that GT's evals were consistently strongly
positive for Black from 19 .. Nf4 onwards. I have played this through and looked
at numerous variations with lots of other engines and not found one that favours
Black until the final crunch.
What other engines would seize the initiative for a K side attack like this?
What is readily apparent on playing through the hairy variations that this game
produces (especially in alternatives to White's rapidly losing 29 Bxa6) is how
FAST Gambit Tiger is in getting to the sharpest tactical lines compared to other
engines. This is not unique to this game: I found the same with the Acs-van Wely
game.
[Event "ICC tourney 223 (10 6)"]
[Site "Internet Chess Club"]
[Date "2002.10.18"]
[Round "1"]
[White "pille"]
[Black "redshift"]
[Result "0-1"]
[ICCResult "White resigns"]
[WhiteElo "1377"]
[BlackElo "2718"]
[Opening "Benoni: classical with e4 and Nf3"]
[ECO "A70"]
[NIC "BI.20"]
[Time "18:13:55"]
[TimeControl "600+6"]
1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 Bg7 8.
Bb5+ Nbd7 9. Bf4 Qe7 10. O-O O-O 11. Re1 Ng4 12. Bg5 Bf6 13. Bxf6 Ndxf6 14.
h3 Ne5 15. Nxe5 Qxe5 16. Bc4 a6 17. a4 Bd7 18. a5 Nh5 19. Re3 Nf4 20. Qb3
Rab8 21. Qb6 g5 22. Qc7 Rfd8 23. Ra3 g4 24. hxg4 Bxg4 25. Rg3 h5 26. Rb3
Rdc8 27. Qb6 Kh7 28. Qa7 Rg8 29. Bxa6 h4 {White resigns} 0-1
Now a test position after 28 .. Rg8: White played the losing Bxa6, but actually
I am pretty certain that White is busted here anyway. I have analysed this
extensively using multiple engines, and Black has a won game no matter what
White does. How long before your engine indicates that White is lost?
[D] 1r4r1/Qp3p1k/p2p4/P1pPq2p/2B1Pnb1/1RN3R1/1P3PP1/6K1 w - - 0 1
However, Black's most sublime move was 27 .. Kh7: perhaps not the very best in
this position but a typical Gambit Tiger attacking move (it gave eval of >2 to
Black at this stage). When I saw this one over the board I felt that GT had the
game in the bag. Would your engine play it (or Kh8?) By my analysis, after Kh7,
both Qa7 and Bf1 lose - Bf1 taking rather longer to do so. Black always seems to
have fresh initiative in the attack that ensues.
[D] 1rr3k1/1p3p2/pQ1p4/P1pPq2p/2B1Pnb1/1RN3R1/1P3PP1/6K1 b - - 0 27
Oh - and here's a bonus for you: that Acs-van Wely game:
[Event "Essent Tournament"]
[Site "Hoogeveen, Netherlands"]
[Date "2002.10.19"]
[Round "6"]
[White "van_Wely(GM)"]
[Black "Acs(GM)"]
[Result "0-1"]
[WhiteElo "2681"]
[BlackElo "2591"]
[Opening "Nimzo-Indian: 4.e3 O-O, 5.Bd3 d5"]
[ECO "E48"]
[NIC "QP.08"]
[Time "05:16:58"]
[TimeControl "7200+0"]
1. d4 d5 2. c4 e6 3. Nc3 Bb4 4. e3 Nf6 5. Bd3 O-O 6. cxd5 exd5 7. Ne2 Re8 8.
O-O Bd6 9. a3 Ng4 10. h3 Nh2 11. Re1 Nf3+ 12. gxf3 Qg5+ 13. Kh1 Qh4 14. Nf4
Bxh3 15. Ncxd5 Re6 16. Nxe6 Bf5+ 17. Kg1 Qh2+ 18. Kf1 Bg3 {Black wins} 0-1
Would your engine play 9 .. Ng4 or 10 .. Nh2? Was Acs' attack winning or could
van-Wely have wriggled out?
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