Author: Gerd Isenberg
Date: 14:58:57 04/21/04
Go up one level in this thread
On April 21, 2004 at 16:55:17, Sune Fischer wrote: >On April 21, 2004 at 16:44:15, Gerd Isenberg wrote: > >>On April 21, 2004 at 16:11:27, Uri Blass wrote: >> >>>Here is another case when I believe that movei blundered by playing Ba7 when >>>after c5 the black bishop is a joke. >>> >>>I am surprised to see that not only movei has no sense of humor but even the >>>ssdf leader Shredder7.04(A1000, 64 mbytes hash) seems not to have it and cannot >>>find the only logical move(Bd4) even after a long time(the second possibility is >>>that I understand nothing about the position and the fact that the black bishop >>>is out of the game is not important). >>> >>>Resp 0.19 - Movei 0.08.178d >>>[D]1k1r3r/2p1n3/p1pq1p2/1pb1p3/1PP1P1pp/P2P3P/2Q1NPP1/R1BR2K1 b - b3 0 1 >>> >> >>Same for IsiChess MMX, likes Ba7 too all the time. >>I thought i recently had implemented some trapped bishob code ;-) >>Or was it already the AMD64 XMM-version which takes some more time? >> >>I guess there is probably wrong king safety compensation for the trapped bishop. >>May be the closing "c5" makes the black king safer, due to less levers but more >>rams on king related files. Other black pieces and the advanced pawns may be >>ready for a king side attack. Interesting position! >> >>Gerd > >I think the code works :) > great! >1 469 1 53 1...Nd5 >1 445 1 72 1...Rdf8 >1 383 1 95 1...Rdg8 >1 375 1 224 1...Bxf2+ 2.Kxf2 >1 371 1 369 1...Bxb4 >1 25 1 397 1...Bd4 >2 25 1 1117 1...Bd4 2.Nxd4 >3 25 1 1593 1...Bd4 2.Nxd4 Qxd4 >4 42 5 4237 1...Bd4 2.Nxd4 Qxd4 3.Bb2 >5 74 8 13546 1...Bd4 2.Nxd4 Qxd4 3.Be3 Qd7 >6 98 11 32942 1...Bd4 2.Nxd4 Qxd4 3.Be3 Qd7 4.d4 >7 98 18 82765 1...Bd4 2.Nxd4 Qxd4 3.Bb2 Qd7 4.d4 exd4 >8 81 33 208399 1...Bd4 2.Nxd4 exd4 3.hxg4 h3 4.gxh3 Rxh3 5.Bb2 Qh2+ 6.Kf1 >9 75 60 430252 1...Bd4 2.Nxd4 exd4 3.hxg4 h3 4.gxh3 Rxh3 5.Kf1 Rg8 6.c5 >10 61 135 1102037 1...Bd4 2.Nxd4 Qxd4 3.Be3 Qd7 4.d4 gxh3 5.cxb5 cxb5 6.dxe5 >11 56 282 2333824 1...Bd4 2.Nxd4 exd4 3.hxg4 h3 4.c5 >12 58 608 5088618 1...Bd4 2.Nxd4 exd4 3.hxg4 h3 4.c5 Qe6 >13 63 1233 10851144 1...Bd4 2.Nxd4 exd4 3.hxg4 h3 4.c5 Qe6 5.gxh3 Rxh3 6.f3 >Qf7 7.Kg2 Rdh8 >14 70 6857 55085739 1...Bd4 2.Nxd4 exd4 3.hxg4 h3 4.c5 Qd7 5.gxh3 Rxh3 6.Qe2 >Rg8 7.f3 Rh5 > >But you are right there is something else going on over on the white kingside. > >If I force Ba7 the score on c5 starts to drop: > >1 234 0 754 2.c5 >2 228 0 857 2.c5 Qe6 >3 208 0 1341 2.c5 Qe6 3.Qa2 >4 211 0 2504 2.c5 Qd7 3.d4 gxh3 >5 184 3 6823 2.c5 Qd7 3.hxg4 a5 4.g5 >6 184 6 20139 2.c5 Qd7 3.hxg4 a5 4.g5 axb4 >7 163 13 71345 2.c5 Qe6 3.hxg4 a5 4.g5 axb4 5.gxf6 >8 154 25 188141 2.c5 Qe6 3.hxg4 a5 4.g5 axb4 5.gxf6 b3 >9 111 81 656987 2.c5 Qe6 3.hxg4 a5 4.d4 axb4 5.axb4 Qxg4 6.Bb2 >10 104 247 2141619 2.c5 Qe6 3.hxg4 Qxg4 4.f3 Qh5 5.d4 a5 6.f4 axb4 >11 72 786 6918271 2.c5 Qd7 3.Kh2 a5 4.bxa5 gxh3 5.gxh3 Ka8 6.a4 Rhg8 7.axb5 >11 73 1372 11915791 2.hxg4 >11 85 2061 17836812 2.hxg4 Qe6 3.g5 h3 4.c5 a5 5.gxh3 Qxh3 6.Ng3 Qh2+ 7.Kf1 >axb4 >12 69 3134 27100571 2.hxg4 Qe6 3.c5 Qxg4 4.f3 Qg7 5.f4 a5 6.Kf2 axb4 7.axb4 >Qg4 >13 63 7731 66687997 2.hxg4 Qe6 3.c5 Qxg4 4.f3 Qg6 5.Kf2 a5 6.bxa5 Rhg8 7.Rg1 >Rd6 >13 64 8845 75640779 2.c5 > >-S. 5..a5 looks interesting. Does your trapped code ignore that possible lever or did you consider that b4 is defended by a pawn on a3? Thanks, Gerd
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.