Author: Uri Blass
Date: 02:21:04 10/07/01
Go up one level in this thread
On October 07, 2001 at 04:57:22, Gareth McCaughan wrote: >Slater Wold wrote: > >> Here is a position from a game I played recently. >> >> How long does it take other engines to get this move? >> >> [D]8/1kbQ2NK/4p2p/8/1p1p1P2/8/4q3/8 w - - 0 1 >> >> Solution is Qxd4! and the game draws. > >Crafty 18.11, Athlon 1GHz, takes about 15 1/2 hours >to switch from Nxe6 to Qxd4. It doesn't think it's >drawing (eval is about -2.6). > >At the moment (nearly 60 hours in) it's working on >ply 20 and doesn't have an eval or a PV yet. >The PV at the end of ply 19 is: > >1. Qxd4 Qc2+ 2. Kxh6 b3 3. Nxe6 b2 >4. Nc5+ Kc6 5. Qd7+ Kb6 6. Na4+ Qxa4 >7. Qxa4 b1=Q 8. Qd4+ Kc6 9. Qc4+ Kd6 >10. Qd4+ Ke6 11. Qc4+ Kd7 12. Qf7+ >Kc8 13. Qg8+ Bd8 14. Qe6+ Kc7 15. Qe5+ >Kd7 16. Qd5+ Ke7 17. f5 > >(gosh! 33 ply.) > >Crafty is alleged to be good at endgames, but if you're >right that Qxd4 draws then it could clearly do with some >improving... > >-- >g It is clear based on the main line that Crafty has no knowledge about KQB vs KQP endgames The position after 7...b1Q should be evaluated as something close to draw because queen and bishop usually does not win against queen and here black has queen and bishop against queen and pawn. Uri
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.