Author: John Merlino
Date: 10:41:54 02/05/06
Go up one level in this thread
On February 05, 2006 at 08:41:28, Mikael Bäckman wrote: >Hi! > >Yesterday Chepla lost a game on ICC vs Witchess because of wrong pawnstructure >eval. > >[D]6k1/2p2rp1/1q2p1p1/1r1b2B1/p1pP1PPP/P7/1P1RRQ2/6K1 b - - 0 33 bm Rb3 > >It takes chepla 17 plies to find 34.. Rb3. There might be other winning moves >too, the idea is to create a passed pawn on the a-file. Other engines play Rb3 >immediately. > >Without regard to the pieces on board, Chepla evaluates the pawnstructure to >+1.02 for white... which causes it to not see the threat. > >What do your engines say? > >/Mikael CM9_R1 on a P4-2.4, for depths 8-10, wants to play Qc6 and then follow with Rb3. After that, at 0:23, it switches to Rb3 for good: Time Depth Score Positions Moves 0:00 1/4 -0.59 2831 33...Rb3 34.Re3 Qc6 35.Rxb3 cxb3 0:00 1/4 -0.64 3800 33...Qc6 34.Re3 Rb8 35.Rde2 Rd7 0:00 1/5 -0.54 8240 33...Qc6 34.Kh2 Rb3 35.Re3 Qa8 36.Rde2 0:00 1/6 -0.61 24616 33...Qc6 34.Re3 Rd7 35.Qe1 Rb3 36.Kh2 0:00 1/7 -0.54 67063 33...Qc6 34.Rc2 Bf3 35.Re3 Bxg4 36.Qg2 Qxg2+ 37.Rxg2 0:01 1/8 -0.56 171657 33...Qc6 34.Re3 Rb3 35.Qe2 Qa8 36.Rxb3 cxb3 37.Qb5 Be4 0:03 1/9 -0.55 501124 33...Qc6 34.Re3 Rb3 35.Rde2 Rd3 36.Qe1 Rd7 37.Qb4 Rxd4 38.Qb8+ Kh7 0:09 1/10 -0.55 1708520 33...Qc6 34.Re3 Rb3 35.Qe1 Rd7 36.f5 Rxe3 37.Qxe3 gxf5 38.gxf5 Be4 39.fxe6 Qxe6 0:23 1/10 -0.59 4379224 33...Rb3 34.Re3 c3 35.Rxc3 Rxc3 36.bxc3 Qb3 37.Rc2 Qxa3 38.Qe1 Rd7 39.Kf2 Qd6 0:32 1/11 -0.57 5934253 33...Rb3 34.Re3 c3 35.Rxc3 Rxc3 36.bxc3 Qb3 37.Rc2 Qxa3 38.Qe1 Rf8 39.c4 Qd3 1:05 1/12 -0.74 12635425 33...Rb3 34.Re3 c3 35.Rxc3 Rxc3 36.bxc3 Qb3 37.Re2 Qxa3 38.Re3 Rd7 39.Qc2 Qb3 40.Re2 Qxc2 41.Rxc2 2:18 1/13 -0.63 27876533 33...Rb3 34.Re3 c3 35.Rxc3 Rxc3 36.bxc3 Qb3 37.Rc2 Qxa3 38.Qe1 c5 39.c4 Qd3 40.cxd5 Qxc2 41.dxe6 jm
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.