Author: Chris Whittington
Date: 07:41:05 09/23/97
Go up one level in this thread
On September 23, 1997 at 08:49:48, Chris Whittington wrote: > >On September 23, 1997 at 06:36:27, Dirk Frickenschmidt wrote: > >>Hi everybody, >> >>I'm glad to return to computer chess again here after all the >>ad-hominem-BS in rgcc. > >Welcome back ! > >> >>When I got Alexej Shriov (Top 10 GM in FIDE and PCA) to playing some >>blitz testgames against the then new Hiarcs6-engine recentlly and we >>talked about strong and weak sides of the new programs he came along >>with one of his favourite test positions from one of his very nice >>games (critical move 24, german notation having D for Q [queen], T for >>R [rook], L for B [bishop] S for N [knight], ): >> >>Shirov,A (2695) - Piket,J (2625) [D52] >> Amsterdam Donner (6), 1995 >> [Shirov /DF] >> >>1.d4 d5 2.c4 c6 3.Sc3 Sf6 4.Sf3 e6 5.Lg5 Sbd7 6.e3 Da5 7.cxd5 Sxd5 >> 8.Dd2 Lb4 9.Tc1 h6 10.Lh4 0-0 11.Ld3 Te8!? N (11...e5) 12.a3 Lxc3 >> 13.bxc3 Dxa3 14.0-0 e5 [14...Df8!?] 15.Sxe5! [15.dxe5?! Dc5 with the >> idea 16...a5, 17...a4.] 15...Sxe5 16.dxe5 Dc5!? [16...Txe5 17.e4 Sb6 >> 18.f4 with the idea 19 f5.] 17.Kh1 Le6 [17...Txe5 18.e4 Th5?! 19.Lg3 >> Sf6 20.Tce1!±] 18.e4 Sb6 19.f4 Lc4 20.Tf3! Lxd3 21.Txd3 Dc4?! >> [21...Kh7] 22.Te1 Kh7 23.Th3 Te6? [23...Dc5 24.Lg5! A) 24...Sc4 >> 25.Dd7! Df2 26.Tg1 Kg8 27.Lxh6 gxh6 28.Dg4+ Kf8 29.Txh6+-; B) >>24...Df8 >> B1) 25.f5? Sc4 26.Df4 Sxe5 27.f6 Te6 28.Tf1 (28.fxg7 Dxg7 29.Lxh6 >>Txh6 >> 30.Txh6+ Dxh6 31.Dxe5 Tg8!÷) 28...Tae8 29.fxg7 Dxg7 30.Lf6 Dg6 31.Tg3 >> Txf6 32.Dxf6 Dxf6 33.Txf6 a5; B2) 25.Tf1! 25...Kg8 (25...Te6 26.f5 >> Txe5 27.f6+-) 26.De2! Te6 (26...hxg5 27.Dh5 f6 28.fxg5 Txe5 29.Dh7+ >>Kf7 >> 30.Txf6++-) 27.f5 Txe5 28.Lf4 Ta5 29.f6 g5 30.Ld6 Dxd6 31.Txh6+-; C) >> 24...Kg8 25.Lxh6 gxh6 26.f5! Df8 27.Txh6 Txe5 28.Th5! (28.Dg5+?! Dg7 >> 29.Dh4 Sd5!÷) 28...f6 29.Da2+ Sd5 (29...Df7? 30.Th8+ Kg7 31.Th7++-; >> 29...Kg7? 30.Te3+-) 30.Te3!± with the idea 30...Kf7 31.Th7+ Ke8 >>32.Teh3 >> Txe4 (32...Sf4 33.T3h4 Td8 34.h3 Txe4 35.Th8+-) 33.Db1 Sxc3 34.Txc3 >>Te7 >> 35.Tch3+-] >> >>24.Lf6!+- >> [DF 24.Lg5!! An even stronger move winning right away found out later >>by >> Shirov. >> Hiarcs6 didn't find the move overnight. Well, Fritz 5 found the idea in >>acceptable analysis time! (P133 with only 4Mb Hash after 3hours 50 >>minutes) >> > > >I tried this on the release version of CSTal. We have this game in >book, so CSTal would play Lf6 without any thought; so I turned the book >off, and put it into infinite mode (PP200). > >It found Bf6 very fast, then after 25 seconds: > >Lg5 !! Kg8 f5 Rxe5 Bxh6 g6 fxg6 +1.90, 7 ply, 25 secs. > >The move was holding later with the score at +2.03 for 9 ply, and >+2..41 failing high at 10 ply, then +2.80 on the 10 ply research. > >Do I get a beer for this ? :) > Still there after two hours, 13 ply. Only +2.60 now, thinks Rg6 is the best defence. The hash table is shot to hell. BTW CSTal works just fine in a DOS window from Win98 (that's Windows ninety-EIGHT, beta version) :-} Chris
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.