Author: Sune Larsson
Date: 09:29:46 05/19/01
Go up one level in this thread
On May 19, 2001 at 11:33:42, Vine Smith wrote: >On May 19, 2001 at 10:46:48, Sune Larsson wrote: > >>On May 19, 2001 at 10:15:06, Vine Smith wrote: >> >>>On May 19, 2001 at 08:52:03, Sune Larsson wrote: >>> >>>>On May 19, 2001 at 06:22:23, Vine Smith wrote: >>>> >>>>>On May 19, 2001 at 05:26:07, Jeroen Noomen wrote: >>>>> >>>>>>Fritz - Gambit Tiger Leiden round 4 >>>>>>------------------------------------- >>>>>>1. d4 d5 2. c4 dxc4 3. e4 Nc6 4. Be3 Nf6 5. Nc3 e5 6. d5 Na5 7. Nf3 Bd6 >>>>>>8. Qa4+ Bd7 9. Qxa5 a6 10. Na4 Qe7 11. a3 Nxe4 12. Bxc4 b5 13. Bd3 Nf6 >>>>>>14. Nc3 e4 15. Nxe4 Nxe4 16. O-O O-O 17. Rfe1 f5 18. h3 Qf7 19. Rad1 Rfe8 >>>>>>20. Bc2 g6 21. b4 Nc3 22. Rd3 Qg7 23. Bd1 Ne4 24. Bd4 Qf7 25. Rde3 g5 >>>>>>26. Bc2 g4 27. hxg4 fxg4 28. Bxe4 gxf3 29. Bxf3 Qf4 30. Bc5 Qh2+ 31. Kf1 >>>>>>Bf4 32. Rxe8+ Bxe8 33. Be3 Bd6 34. Ke2 Bh5 35. Rd1 Qe5 36. Rd4 Bxf3+ >>>>>>37. gxf3 Qf5 38. Rd3 h5 39. a4 h4 40. axb5 h3 41. Qa1 h2 42. b6 cxb6 >>>>>>43. Qh1 Rc8 44. f4 Qh5+ 45. Kf1 Rc2 46. Bd2 Bxf4 47. d6 Rxd2 48. Rxd2 Bxd2 >>>>>>49. d7 Qd1+ 50. Kg2 Qxh1+ 0-1 >>>>> >>>>>Astonishing positional suicide -- few, if any, humans would ever play 21.b4, >>>>>entombing the queen. Of course, Tiger could afford to open the game in any way >>>>>it pleased after that. It would be interesting to see if the lack of interest in >>>>>liberating the queen is duplicated by many programs; correct or not, I would >>>>>have been so concerned about this offside post that I would have played 17.Qe1 >>>>>immediately. >>>> >>>> >>>> The terms "mobility" and "king safety" comes to mind after this kamikaze... >>>> >>>> Anyway, I made a quick check on PIII 800 with 128 Mb hash. 4 min ponder. >>>> >>>> Fritz 5.32 21.b3 and later plays b3-b4. >>>> Fritz 6 Old 21.b3 >>>> Fritz 6 (Newest) 21.b4 >>>> Deep Fritz 21.b4 >>>> Hiarcs 7.32 21.b4 >>>> >>>> Then we have some non closers: >>>> >>>> Crafty 18.08 21.Bc1 >>>> Shredder 5 21.h4 >>>> Gandalf 4.32h 21.Kf1 or 21.Re2 (shifting after 4.02) >>>> >>>> Sune >>> >>>Horrible that not only Fritz, but also Deep Fritz (this program is going to play >>>Kramnik???) and Hiarcs (with something of a good reputation for positional play, >>>I thought) commit this blunder. Also, any program that doesn't evaluate the >>>resulting position at something like -2.00 or lower has nothing to be proud of. >>>I'm putting together a suite of positional problems to evaluate programs' >>>understanding or lack thereof, and I'll have to include this position as an >>>"avoid move" type of problem (even though it's a little unfair to Fritz, which >>>will of course fail this one). >> >> >>>Can you tell if Gandalf wants to play 21.Re2 in order to follow up with 22.Qe1? >>>If so, that would mark it as the only program so far to demonstrate some concern >>>about the queen's situation. >>> >>>Regards, >>>Vine >> >> Gandalf ponders about lines like 21.Re2 Nf6 22.Ng5 Qe7 23.Qc3, but >> after some 8 minutes again shifts to 21.Kf1 b4 22.a4 = (Gandalf) >> >> Sune > >Ugh! This suggests some generalized failure of program evaluation routines. Even >in Gandalf's line with 21...b4 22.a4, having the queen cut off in this manner >seems fatal. I'm going to investigate whether very long-term searches will >correct this fault, which would at least give these programs the hope that with >the faster hardware of tomorrow, they could avoid such disastrous decisions. > >Regards, >Vine Long-term searches here would sure be interesting - as your coming suite of positional problems. The latter must be pure gold for the programmers, if it's possible to pinpoint down just what the positions are all about - and transform them into programming language... Sune
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.