Author: Kurt Utzinger
Date: 03:01:45 01/04/03
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On January 04, 2003 at 05:33:23, Sune Fischer wrote: >In a most recent game my engine ended up in this position as black: > >[D] 3q4/3P2kp/5p2/p7/1p1R2P1/8/2Q2PK1/4r3 b - - 0 1 > >It played Kf8 here and Tinker played Qxh7 (instantly by the way, ponder hit I >think) the score dropped to -6 real fast. >Before Kf8 the score was drawish. > >Whenever I see something like that I'm interested in why it couldn't sense the >danger sooner. > >It is a complicated position, I think white is winning, but have to be careful >not getting a perpetual check. The question is, what is the real score here and >what is the best move? >But even more important, how do I make it fail low on Kf8 faster? > >-S. Hi Sune This position is an easy win for white who threatens 1.Qc8 +- and against this deadly threat black's only move is 1...Qa8+ but it does not help as can be seen from the following analysis of Shredder7 and Fritz8005 on P4 1.8/32 MB hash Utzinger,K - Shredder 7 3q4/3P2kp/5p2/p7/1p1R2P1/8/2Q2PK1/4r3 b - - 0 1 Analysis by Shredder 7: 1...Kg8 2.Qc8 Re8 3.dxe8Q+ Qxe8 ² (0.41) Depth: 1/6 00:00:00 1...Qa8+ 2.f3 Qd8 3.Kf2 Re7 ³ (-0.65) Depth: 4/10 00:00:00 = (-0.06) Depth: 4/10 00:00:00 1...Kf8 2.Qxh7 Qa8+ 3.Re4 Qxe4+ 4.Qxe4 Rxe4 5.d8Q+ Kg7 6.Qd7+ Kf8 7.Qf5 Re2 8.Qxa5 = (-0.07) Depth: 4/16 00:00:00 +- (4.48) Depth: 8/27 00:00:01 508kN 1...Qa8+ 2.f3 Qd8 3.Rd2 Kf8 4.Qxh7 Re5 5.Qh8+ Ke7 +- (4.47) Depth: 8/27 00:00:02 574kN +- (1.76) Depth: 8/28 00:00:06 1695kN 1...f5 2.gxf5 h5 3.f6+ Kxf6 4.Qc8 Ke7 5.Qc5+ Kf6 6.Rd6+ Re6 7.Qc8 Kf5 8.Qxd8 Kf4 +- (1.75) Depth: 8/28 00:00:06 1817kN +- (5.90) Depth: 10/35 00:00:39 10378kN 1...Qa8+ 2.f3 Qd8 3.Kf2 b3 4.Qc3 Re5 5.Qc8 Qe7 6.d8B Qe6 +- (5.89) Depth: 10/35 00:00:40 10657kN +- (4.39) Depth: 12/39 00:03:19 54725kN (Utzinger, MyTown 04.01.2003) ************************************************************************************ Utzinger,K - Fritz 8 3q4/3P2kp/5p2/p7/1p1R2P1/8/2Q2PK1/4r3 b - - 0 1 Analysis by Fritz 8: 1...Kf8-- 2.Qxh7 Qa8+ 3.Kg3 Qb8+ 4.f4 Re8 5.dxe8Q+ Qxe8 ² (0.37) Depth: 7/19 00:00:00 137kN +- (4.41) Depth: 9/35 00:00:02 1710kN 1...Qa8+-- +- (4.37) Depth: 9/35 00:00:03 2570kN +- (3.22) Depth: 14/45 00:01:54 82279kN (Utzinger, MyTown 04.01.2003) Kurt Homepage "Kurt & Rolf Chess": http://www.beepworld.de/members39/utzinger
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