Author: John Merlino
Date: 09:17:26 04/18/02
Go up one level in this thread
On April 18, 2002 at 09:44:40, Art Basham wrote: >I wonder what program is the first to find >1. Qa8...?! > >[D]3Q4/3p4/P2p4/N2b4/8/4P3/5p1p/5Kbk w - - bm Qa8; id Quick-03; Another tough one for CM. This is on a PIII-733: Time Depth Score Positions Moves 0:00 1/4 -1.65 2565 1.Qf8 Bg2+ 2.Ke2 f1=Q+ 3.Qxf1 Bxf1+ 4.Kxf1 Bxe3 5.Nc4 0:00 2/5 -1.58 4510 1.Qf8 Bg2+ 2.Ke2 f1=Q+ 3.Qxf1 Bxf1+ 4.Kxf1 Bxe3 5.Nc4 Bc5 0:00 3/6 -1.80 8449 1.Qf8 Bg2+ 2.Ke2 f1=Q+ 3.Qxf1 Bxf1+ 4.Kxf1 Bxe3 5.Nc4 Bc5 6.Nd2 Ba7 0:01 4/7 -1.69 50937 1.Qf8 Bg2+ 2.Ke2 f1=R 3.Qxd6 Bxe3 4.Qd3 Bb6 5.Nc4 Kg1 0:02 5/8 -0.95 108249 1.Qf8 Bg2+ 2.Ke2 f1=Q+ 3.Qxf1 Bxf1+ 4.Kxf1 Bxe3 5.Nc4 Ba7 6.Nxd6 Bc5 7.Nb5 d5 0:04 6/9 -0.66 253286 1.Qf8 Bg2+ 2.Ke2 f1=B+ 3.Kd2 Bxa6 4.Qf4 d5 5.Ke1 Bc4 6.Qd4 Bf3 7.Nxc4 dxc4 8.Qxc4 0:38 7/10 0.00 3248769 1.Qf8 Bg2+ 2.Ke2 f1=N 3.a7 Ng3+ 4.Ke1 Bxe3 5.a8=Q Bxa8 6.Qxa8+ d5 7.Qxd5+ Kg1 8.Qf3 Bd2+ 9.Kxd2 h1=Q 10.Qxg3+ Qg2+ 11.Qxg2+ Kxg2 2:40 8/11 0.00 15480245 1.Qf8 Be4 2.Ke2 Kg2 3.Qg7+ Kh3 4.Qxd7+ Kg3 5.Qg7+ Kh3 6.Qh8+ Kg3 7.Qg8+ Kh4 8.Qh8+ Kg3 4:08 8/11 2.23 23343627 1.Qa8 Bxa8 2.Nb7 d5 3.Nd6 d4 4.e4 Bc6 5.a7 Ba4 6.a8=Q Bc6 7.Qf8 4:09 9/12 5.18 23391010 1.Qa8 Bxa8 2.Nb7 d5 3.Nd6 d4 4.e4 Bc6 5.a7 Ba4 6.a8=Q Bc6 7.Qf8 Bxe4 8.Nxe4 4:57 10/13 Mate09 28809773 1.Qa8 Bxa8 2.Nb7 d5 3.Nd6 d4 4.e4 Bc6 5.a7 Ba4 6.a8=Q Bc6 7.Qf8 Bxe4 8.Nxe4 d5 9.Qf3# However, using the Solve for Mate mode, CM finds a different mate sequence in 13 seconds -- with a surprising twist -- a promotion to a Bishop (same as a Queen in this case): Time Depth Score Positions Moves 0:13 17/17 Mate09 2840756 1.Qa8 Bxa8 2.Nb7 d5 3.Nd6 d4 4.e4 Bc6 5.a7 Bb5+ 6.Nxb5 d5 7.a8=B d3 8.e5 d2 9.Bxd5# jm
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