Author: Robert Hyatt
Date: 13:47:43 06/09/01
Go up one level in this thread
On June 09, 2001 at 14:09:53, Robin Smith wrote: >On June 09, 2001 at 11:19:49, Robert Hyatt wrote: > >>On June 09, 2001 at 05:18:45, Gian-Carlo Pascutto wrote: >> >>>On June 08, 2001 at 15:19:09, Robert Hyatt wrote: >>> >>>>Here is a cute position that occurred between a commercial program and Crafty >>>>last week: >>>> >>>>[D] 8/p4pp1/3rk2p/4p3/2P5/2K4P/P2R1PP1/8 w - - 0 1 >>>> >>>>Crafty was black and moved the rook to d6, offering a trade. The opponent >>>>took it and was happy to do so. Unfortunately, white is lost. White saw >>>>the passed pawn and apparently was quite happy. Crafty's static evaluation >>>>for this position is -1.0 roughly. >>> >>>depth=15 1/20 +0.00 1. Rxd6+ Kxd6 2. Kb4 Kc6 3. Ka5 f5 4. h4 Kc5 5. Ka6 Kxc4 6. >>>Kxa7 Kb4 7. Kb6 Ka3 8. Kc7 Kxa2 >>> >>>Am I missing something here? >>> >>>After the trade I get: >>> >>>depth=15 1/20 -0.15 2. Kb4 Kc6 3. c5 f5 4. h4 g5 5. h5 g4 6. a3 e4 7. Kc4 f4 8. >>>Kd4 g3 9. fxg3 >>> >>>Not very convincing... >>> >>>-- >>>GCP >> >> >>Apparently I have made more changes in 18.10 than I realized. At depth=15, >>my score is way below zero... But the main thing is to avoid Rd6 which simply >>loses... > >You keep saying this "simply loses", but with what evidence? With Crafty 18.08 >vs. itself, at both 13 plies/move and 15 plies/move the game is drawn. If it >loses at all it certainly isn't simple. > >Robin The plan has already been explained multiple times (by myself and others). I would not call it trivial, but a human certainly ought to be able to see that white is _not_ +1 as my opponent said during the game. _that_ was the main point here. Black is doing just fine. I don't see how white can answer the threat of black's passer, and black has _already_ answered the threat of white's.
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.