Author: Steven J. Brann
Date: 20:45:32 12/28/02
Go up one level in this thread
[snip] >I backed the problem one move prior to Qa7 and standard CM9K out of the box saw >mate-in-16 in 58 seconds on my machine (Xeon P4 1.8 Ghz Win 2K). I tested many >of the big name engines I have and not one found it in less than a minute. I >also tried it with the Utzinger settings and that did not find in on my machine >i>1". > >He is running pretty fast machine. > >Michael [D]n2k2qr/3p2Nn/2pPp2p/4p3/1B1P4/Q5P1/5P2/1B1KR3 b - - 0 1 My P4 1.9G machine doesn't perform particularly well vs. other machines of similar CPU speed. However, increasing the selective search setting will usually help reduce time to find long mates. Mate in 16 in 47 seconds and then shortened to Mate in 15. CM9000 default with 128M hash; SS = 12 (backed up one move) Time Depth Score Positions Moves 0:00 1/5 8.31 6900 1...Nb6 2.Qa7 Qxg7 3.Qb8+ Nc8 4.Ba5+ Ke8 5.Qxc8+ Kf7 6.Qxd7+ Kg8 7.Qxe6+ Qf7 8.Qxf7+ Kxf7 9.dxe5 0:00 1/6 8.69 23203 1...Nb6 2.Qa7 Qxg7 3.Qb8+ Nc8 4.Ba5+ Ke8 5.Qxc8+ Kf7 6.Qxd7+ Kg8 7.Qxe6+ Qf7 8.Ba2 Qxe6 9.Bxe6+ Kg7 10.dxe5 0:00 1/7 9.72 70542 1...Nb6 2.Qa7 Qxg7 3.Qb8+ Nc8 4.Ba5+ Ke8 5.Qxc8+ Kf7 6.Qxd7+ Kg8 7.Qxe6+ Qf7 8.Qg4+ Ng5 9.d7 Kg7 10.d8=Q Rxd8 11.Bxd8 0:01 1/8 12.89 178846 1...Nb6 2.Qa7 Qxg7 3.Qb8+ Nc8 4.Qc7+ Ke8 5.Qxc8+ Kf7 6.Qxd7+ Kg8 7.Qe8+ Nf8 8.d7 c5 9.d8=Q cxb4 10.Qxe6+ Qf7 11.Qxf7+ Kxf7 12.dxe5 0:02 1/9 15.75 410885 1...Nb6 2.Qa7 Qxg7 3.Qb8+ Nc8 4.Qc7+ Ke8 5.Qxc8+ Kf7 6.Qxd7+ Kg8 7.Qe8+ Nf8 8.d7 c5 9.d8=Q Qg4+ 10.Kc1 Qg5+ 11.Qxg5+ hxg5 12.dxc5 0:04 1/10 16.29 1095748 1...Nb6 2.Qa7 Qxg7 3.Qb8+ Nc8 4.Qc7+ Ke8 5.Qxc8+ Kf7 6.Qxd7+ Kg8 7.Qe8+ Nf8 8.d7 c5 9.d8=Q Rh7 10.Bxh7+ Kxh7 11.dxc5 0:14 1/11 25.18 3367368 1...Nb6 2.Qa7 Qxg7 3.Qb8+ Nc8 4.Qc7+ Ke8 5.Qxc8+ Kf7 6.Qxd7+ Kg8 7.Qe8+ Nf8 8.d7 c5 9.d8=Q e4 10.Qxe6+ Qf7 11.Ba2 Rh7 12.Qg6+ Kh8 13.Bxf7 0:47 1/12 Mate16 11696135 1...Nb6 2.Qa7 Qxg7 3.Qb8+ Nc8 4.Qc7+ Ke8 5.Qxc8+ Kf7 6.Qxd7+ Kf8 7.Qd8+ Kf7 8.Qe7+ Kg8 9.Qe8+ Nf8 10.d7 c5 11.d8=Q e4 12.Qxe6+ Qf7 13.Bxc5 Kg7 14.Qxf7+ Kxf7 15.Qe7+ Kg8 16.Qxf8+ Kh7 2:11 1/13 Mate15 32918343 1...Nb6 2.Qa7 Qxg7 3.Qb8+ Nc8 4.Qc7+ Ke8 5.Qxc8+ Kf7 6.Qxd7+ Kf8 7.Qd8+ Kf7 8.Qc7+ Kg8 9.d7 Qg4+ 10.Kc1 Qg5+ 11.f4 exf4 12.d8=Q+ Qxd8 13.Qxd8+ Kg7 14.Qe7+ Kg8 15.Bxh7+ Rxh7 16.Qf8# 6:10 2/14 Mate15 94268178 1...Nb6 2.Qa7 Qxg7 3.Qb8+ Nc8 4.Qc7+ Ke8 5.Qxc8+ Kf7 6.Qxd7+ Kf8 7.Qd8+ Kf7 8.Qc7+ Kg8 9.d7 Qg4+ 10.Kc1 Qg5+ 11.f4 exf4 12.d8=Q+ Qxd8 13.Qxd8+ Kg7 14.Qe7+ Kg8 15.Bxh7+ Rxh7 16.Qf8# Chessmaster default: CM9000 default Time Depth Score Positions Moves 0:00 1/4 8.03 3104 1...Nb6 2.Qa7 Qxg7 3.Qb8+ Nc8 4.Qc7+ Ke8 5.Qxc8+ Kf7 6.Qxd7+ Kg8 7.Qxe6+ Qf7 8.Qxf7+ Kxf7 9.dxe5 0:00 1/5 8.31 6900 1...Nb6 2.Qa7 Qxg7 3.Qb8+ Nc8 4.Ba5+ Ke8 5.Qxc8+ Kf7 6.Qxd7+ Kg8 7.Qxe6+ Qf7 8.Qxf7+ Kxf7 9.dxe5 0:00 1/6 8.69 23203 1...Nb6 2.Qa7 Qxg7 3.Qb8+ Nc8 4.Ba5+ Ke8 5.Qxc8+ Kf7 6.Qxd7+ Kg8 7.Qxe6+ Qf7 8.Ba2 Qxe6 9.Bxe6+ Kg7 10.dxe5 0:00 1/7 9.72 70542 1...Nb6 2.Qa7 Qxg7 3.Qb8+ Nc8 4.Ba5+ Ke8 5.Qxc8+ Kf7 6.Qxd7+ Kg8 7.Qxe6+ Qf7 8.Qg4+ Ng5 9.d7 Kg7 10.d8=Q Rxd8 11.Bxd8 0:00 1/8 12.89 178846 1...Nb6 2.Qa7 Qxg7 3.Qb8+ Nc8 4.Qc7+ Ke8 5.Qxc8+ Kf7 6.Qxd7+ Kg8 7.Qe8+ Nf8 8.d7 c5 9.d8=Q cxb4 10.Qxe6+ Qf7 11.Qxf7+ Kxf7 12.dxe5 0:01 1/9 15.75 410460 1...Nb6 2.Qa7 Qxg7 3.Qb8+ Nc8 4.Qc7+ Ke8 5.Qxc8+ Kf7 6.Qxd7+ Kg8 7.Qe8+ Nf8 8.d7 c5 9.d8=Q Qg4+ 10.Kc1 Qg5+ 11.Qxg5+ hxg5 12.dxc5 0:04 1/10 16.29 1096202 1...Nb6 2.Qa7 Qxg7 3.Qb8+ Nc8 4.Qc7+ Ke8 5.Qxc8+ Kf7 6.Qxd7+ Kg8 7.Qe8+ Nf8 8.d7 c5 9.d8=Q Rh7 10.Bxh7+ Kxh7 11.dxc5 0:14 2/11 25.18 3578137 1...Nb6 2.Qa7 Qxg7 3.Qb8+ Nc8 4.Qc7+ Ke8 5.Qxc8+ Kf7 6.Qxd7+ Kg8 7.Qe8+ Nf8 8.d7 c5 9.d8=Q e4 10.Qxe6+ Qf7 11.Ba2 Rh7 12.Qg6+ Kh8 13.Bxf7 4:10 3/12 Mate16 63312568 1...Nb6 2.Qa7 Qxg7 3.Qb8+ Nc8 4.Qc7+ Ke8 5.Qxc8+ Kf7 6.Qxd7+ Kf8 7.Qd8+ Kf7 8.Qe7+ Kg8 9.Qe8+ Nf8 10.d7 c5 11.d8=Q e4 12.Qxe6+ Qf7 13.Bxc5 Kg7 14.Qxf7+ Kxf7 15.Qe7+ Kg8 16.Qxf8+ Kh7 Note: It would appear that the mate in 16 output is about maximum for the copy contents fucntion to pick up. The (#) character signifying mate is missing from the last move. Steve
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