Author: John Merlino
Date: 08:46:58 01/04/03
Go up one level in this thread
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. Chessmaster 9000, on a P3-733, at depth 11, finds an interesting third move for White in the 1...Qa8+ 2.f3 Qd8 line -- 3.g5! -- with an eval of almost +3. On the next depth, it goes with a completely different line with 2...Re3, even more winning for White: Time Depth Score Positions Moves 0:00 1/3 4.03 2769 1...f5 2.Qc8 Re4 3.Rxe4 0:00 1/3 -0.26 3269 1...Kf8 2.Rd1 Rxd1 3.Qxd1 0:00 1/3 -0.32 4620 1...Kf7 2.Rd1 Rxd1 3.Qxd1 0:00 1/3 -0.48 8430 1...Qa8+ 2.Kg3 Rg1+ 3.Kf4 Qb8+ 4.Kf3 0:00 1/4 -0.10 14117 1...Qa8+ 2.f3 Qd8 3.Kf2 Rh1 4.Rd1 0:00 1/4 -0.37 18422 1...Kf8 2.Qxh7 b3 3.Qh8+ Ke7 0:00 1/5 -0.31 30553 1...Kf8 2.Qxh7 b3 3.Qh8+ Ke7 4.Qh7+ Ke6 5.Qd3 0:03 1/6 0.00 89320 1...Kf8 2.Qxh7 b3 3.Qh8+ Ke7 4.Qh7+ Ke6 5.Qf5+ Ke7 6.Qh7+ 0:05 1/7 0.70 220832 1...Kf8 2.Qxh7 Re5 3.Kf1 b3 4.Rd6 Rg5 5.Qh6+ Kg8 6.Rxf6 0:06 1/7 0.67 270723 1...Qa8+ 2.f3 Qd8 3.Qc8 Qe7 4.Re4 Rxe4 5.d8=Q Re2+ 6.Kf1 Qxd8 7.Qxd8 0:11 1/8 0.17 666820 1...Qa8+ 2.f3 Qd8 3.Qc8 Qe7 4.Re4 Rxe4 5.d8=Q Re2+ 6.Kf1 Re1+ 7.Kf2 Qe2+ 8.Kg3 0:20 2/9 0.98 1469114 1...Qa8+ 2.f3 Qd8 3.Kf2 b3 4.Qxb3 Qe7 5.Qd3 Rh1 6.Kg2 0:51 3/10 0.98 4035919 1...Qa8+ 2.f3 Qd8 3.Kf2 b3 4.Qxb3 Qe7 5.Qd3 Rh1 6.Qe4 Rh2+ 7.Kf1 Rh1+ 8.Ke2 Rh2+ 9.Ke3 2:02 4/11 2.94 10421802 1...Qa8+ 2.f3 Qd8 3.g5 fxg5 4.Kf2 b3 5.Qc3 Re5 6.Rd6 Kf8 7.Qxe5 a4 8:08 5/12 4.63 41800334 1...Qa8+ 2.f3 Re3 3.Qf2 Re8 4.dxe8=Q Qxe8 5.Qd2 Qe6 6.Rd7+ Kg8 7.Ra7 Qe8 8.Rxa5 b3 9.Qb2 jm
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