Author: Mike Hood
Date: 18:18:25 01/12/03
A question out of morbid curiosity: what's the highest incorrect score that anyone has seen a top chess program award? ie, what's the highest winning score that a chess program gives itself, blind to the fact that it must unavoidably lose? The highest score I have seen is Fritz 8 in the recently posted "Georgian Peasant" game. [D] 8/3P3k/n2K3p/2p3n1/1b4N1/2p1p1P1/8/3B4 w 1. Nf6+ Kg7 2. Nh5+ Kg6 3. Bc2+ Kxh5 4. d8=Q Nf7+ 5. Ke6 Nxd8+ 6. Kf5 e2 7. Be4 e1=N 8. Bd5 c2 9. Bc4 c1=N 10. Bb5 Nc6 11. Bxc6 Nc7 12. Ba4 Nc2 13. Bxc2 Ne2 14. Bd1 Nd5 15. Bxe2# 1-0 After 3. Bc2+, Fritz 8's winning score for Black soars ever higher: Analysis by Fritz 8: 3...Kxh5 4.Bd1+ Kg6 5.Kc6 Nb8+ 6.Kd6 Nxd7 7.Kxd7 Kf5 -+ (-7.56) Depth: 7/21 00:00:00 71kN 3...Kxh5! -+ (-7.84) Depth: 8/27 00:00:00 182kN 3...Kxh5! -+ (-8.13) Depth: 9/30 00:00:01 470kN 3...Kxh5-- -+ (-7.84) Depth: 10/23 00:00:01 489kN 3...Kxh5 4.Bd1+ Kg6 -+ (-7.84) Depth: 10/29 00:00:01 678kN 3...Kxh5! -+ (-8.13) Depth: 11/29 00:00:03 1375kN 3...Kxh5! -+ (-8.41) Depth: 12/35 00:00:08 3525kN 3...Kxh5! -+ (-8.69) Depth: 13/38 00:00:22 9391kN 3...Kxh5! -+ (-8.97) Depth: 13/40 00:00:34 14045kN 3...Kxh5 4.Bd1+ Kg6 5.Kd5 Nf7 6.Kc4 Ne5+ 7.Kb3 Nxd7 8.Be2 Nc7 9.Kc2 Kf6 -+ (-9.16) Depth: 13/40 00:00:45 18913kN 3...Kxh5 4.Bd1+ Kg6 5.Kd5 Nf7 6.Kc4 Ne5+ 7.Kb3 Nxd7 8.Kc2 Ne5 9.Be2 Nc7 10.Kd1 Kf5 11.Kc2 -+ (-9.34) Depth: 14/40 00:01:27 34783kN 3...Kxh5! -+ (-9.63) Depth: 15/44 00:03:03 72060kN 3...Kxh5 4.Bd1+ Kg6 5.Kd5 Nf7 6.Kc4 Ne5+ 7.Kb3 Nxd7 8.Kc2 Ne5 9.Be2 c4 10.Bf1 Nc5 11.Be2 Nd3 -+ (-9.78) Depth: 16/46 00:06:14 149982kN 3...Kxh5! -+ (-10.06) Depth: 17/47 00:15:11 372788kN It's not a matter of Fritz choosing the wrong move for Black. Kxh5 is correct, but Fritz doesn't expect White to play d8Q! I'm not just knocking Fritz. None of the chess programs in my possession do any better. I even tried setting Fritz's selectivity parameter to zero, to prevent null move generation, but found no improvement. So, does anyone have any other position that the current top programs totally misjudge?
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.