Author: Andreas Guettinger
Date: 15:34:45 11/20/02
Do you think the tactical abilities of you engine are sufficient? Here a position from the game Boleslawski-Flohr to test the computers. [Event "Ch URS"] [Site "Moscow (Russia)"] [Date "1950.??.??"] [Round "?"] [White "Boleslavsky Isaak (BLR)"] [Black "Flohr Salomon (RUS)"] [Result "1-0"] [ECO "B11"] 1.e4 c6 2.Nc3 d5 3.Nf3 Bg4 4.h3 Bxf3 5.Qxf3 e6 6.d4 Nf6 7.Bd3 dxe4 8.Nxe4 Qxd4 9.Be3 Qd8 10.O-O-O Nbd7 11.Bc4 Qa5 12.Bd2 Qb6 13.Rhe1 Nxe4 14.Rxe4 Nf6 15.Bxe6 fxe6 16.Rxe6+ Be7 17.Rde1 Nd5 18.Bg5 O-O-O 19.Bxe7 Nxe7 20.Rxe7 Rhf8 21.Qg4+ Kb8 22.Qxg7 Qxf2 23.b3 Rg8 24.Qxh7 Rxg2 25.Rxb7+ Ka8 26.Rbe7 Qc5 27.h4 a5 28. Re8 Qd4 29.Kb1 Rd2 30.Rxd8+ Qxd8 31.Qe4 Qf6 32.h5 1-0 Position after the move 14. ... Nf6: [D] r3kb1r/pp3ppp/1qp1pn2/8/2B1R3/5Q1P/PPPB1PP1/2KR4 w kq - Does your computer see the win for white here? (Draw by repetition is not sufficient.) 1. Bxe6 fe 2. Rxe6+ Be7 3. Rde1 0-0 4. Rxe7 Nd5 5. Rxg7+!! Kxg7 6. Bc3+ Nxc3 7. Re7+ +- 3. .... Nd5 4. Bg5 0-0-0 5. Bxe7 Nxe7 6. Rxe7 +- 2. ... Kf7 3. Rxf6 gf 4. Qh5+ Kg8 5. Qg4+ Kf7 6. Qc4+ Kg6 7. Qe4+ Kf7 8. Ba5 Bh6+ (8. ... Qc5 9. Rd7+ Be7 10. Bb4 Qe5 11. Rxe7+ +-) 9. Kb1 Rad8 10. Qc4+ Kg7 11. Qg4+ Kf7 12. Bxb6 Rxd1+ 13. Qxd1 +- Time to improve your extensions? Seems to me some engines get confused by the repetitions. Let's see. ;) regards Andreas (analysis courtesy from "Erfolgreiche Schachlehre", David Bronstein)
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