Author: John Merlino
Date: 22:10:02 06/03/04
Go up one level in this thread
On June 03, 2004 at 20:43:35, Dann Corbit wrote: >On June 03, 2004 at 20:21:33, Rob Basham wrote: > >>On June 03, 2004 at 18:36:37, John Merlino wrote: >> >>>On June 03, 2004 at 18:23:34, Rob Basham wrote: >>> >>>>[D]r2q1rk1/1p2bpp1/p1b2n1p/8/5B2/2NB4/PP1Q1PPP/3R1RK1 w - - 0 1 >>>> >>>>White played...Bxh6...! >>>> >>>>I was wondering if any progams out there found this one...? >>>> >>>>From the BIG BOOK OF COMBINATIONS....by Schiller >>> >>>Looks pretty easy for computers. At least CM_SKR on an AMD 2500 finds it in less >>>than one second: >>> >>>Time Depth Score Positions Moves >>>0:00 1/3 0.90 2044 1.Qe3 Nd5 2.Qe4 >>>0:00 1/3 0.94 3665 1.Bxh6 gxh6 2.Qxh6 Re8 3.Rfe1 Qd4 >>>0:00 1/4 1.19 11622 1.Bxh6 gxh6 2.Qxh6 Qc7 3.Rfe1 Rad8 >>> 4.Re3 >>>0:00 1/4 1.23 13479 1.Qe3 Re8 2.Bxa6 Bd6 3.Qd4 >>>0:00 1/5 1.06 26596 1.Qe3 Bb4 2.Bxa6 Qa5 3.Bc4 Rad8 >>>0:00 1/5 1.08 35316 1.Qe2 Re8 2.Bg6 fxg6 3.Qc4+ Kh7 >>> 4.Rxd8 Rexd8 >>>0:00 1/5 1.19 56570 1.Bxh6 gxh6 2.Qxh6 Qc7 3.Rfe1 Rad8 >>> 4.Qg5+ Kh8 5.Re3 >>>0:01 1/6 1.25 114510 1.Bxh6 gxh6 2.Qxh6 Qa5 3.Rfe1 Qc5 >>> 4.Bf5 Qxf5 5.Rxe7 Bxg2 6.Kxg2 >>>0:03 1/7 1.31 566655 1.Bxh6 Qa5 2.Rfe1 Rfe8 3.Qg5 Qxg5 >>> 4.Bxg5 Bc5 5.Bxf6 gxf6 >>>0:05 1/8 1.34 1098085 1.Bxh6 Qa5 2.Rfe1 Rfe8 3.Qg5 Qxg5 >>> 4.Bxg5 Bc5 5.Bxf6 gxf6 6.Bf5 Rxe1+ >>> 7.Rxe1 >>>0:12 1/9 1.27 2784479 1.Bxh6 Qa5 2.Rfe1 Rfe8 3.Qf4 Rad8 >>> 4.Bg5 Ba4 5.Rd2 Bd6 >>>0:28 1/10 1.23 6365797 1.Bxh6 Qa5 2.Rfe1 Rfe8 3.Qg5 Qxg5 >>> 4.Bxg5 Rad8 5.Bf5 Rxd1 6.Rxd1 Rd8 >>> 7.Rxd8+ Bxd8 >>>1:18 1/11 1.24 18705733 1.Bxh6 Qa5 2.Rfe1 Rfe8 3.Bf4 Rad8 >>> 4.a3 Kf8 5.Qc1 Qb6 6.b4 Ng4 >>> >>>jm >> >>Thanks John.... >> >>Offset also finds it very quickly....But if it is "so easy" for computers...why >>doesn't the >>CM-9000 KING main engine find it...? >> >>The King plays ....Qe2 or Qe3....:-) > >Because the difference is only a few hundredths of a centipawn between those >choices. Confirmed. Using the default personality, at times the difference between Qe2 and Bxh6 is generally less than 0.1 of a pawn. Only at depth 10 (after about 50 seconds) does Bxh6 become noticeably better. jm
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