Author: John Merlino
Date: 10:27:33 05/16/03
Go up one level in this thread
On May 15, 2003 at 22:44:16, Mike Byrne wrote: >the position below is a mate in 3 .... > >some programs have a hard time with it... Crafty and Tiger come to mind, this >may be very easy for CM9K ... > >[d]8/8/8/4np1K/1NN2k2/1R6/1P5P/3n4 w - - 0 1 > >Mike Ok, just to verify, in this position, CM9000 finds Mate in 3 in two seconds: Time Depth Score Positions Moves 0:00 1/3 7.84 1427 1.Nxe5 Kxe5 2.Nd3+ Ke4 3.Nc5+ Kd5 4.Rd3+ Kxc5 5.Rxd1 0:00 1/4 7.75 4876 1.Nxe5 Kxe5 2.Nd3+ Ke4 3.Nc5+ Ke5 4.Nd7+ Kf4 5.Nf6 0:00 1/4 7.78 10343 1.Nd5+ Ke4 2.Nf6+ Kd4 3.Nxe5 Kxe5 4.Nd7+ Ke4 5.Rb4+ Kd5 6.Kg5 0:00 1/5 7.96 21847 1.Nd5+ Ke4 2.Nf6+ Kd4 3.Nxe5 Kxe5 4.Kg5 Ke6 5.Nh5 Ke5 0:01 1/6 8.96 113243 1.Nd5+ Ke4 2.Nf6+ Kd4 3.Nxe5 Kxe5 4.Kg5 Kd4 5.Kxf5 Ne3+ 6.Kg5 Nc4 0:01 2/7 9.10 213186 1.Nd5+ Ke4 2.Nf6+ Kd4 3.Nxe5 Kxe5 4.Kg5 Kd4 5.Kxf5 Ne3+ 6.Kg5 Nc4 7.h4 0:02 2/7 Mate03 322047 1.Re3 Nxe3 2.Nd2 N5g4 3.Nd3# 0:02 3/8 Mate03 323181 1.Re3 Nxe3 2.Nd2 N5g4 3.Nd3# 0:02 4/9 Mate03 325904 1.Re3 Nxe3 2.Nd2 N5g4 3.Nd3# 0:02 5/10 Mate03 327081 1.Re3 Nxe3 2.Nd2 N5g4 3.Nd3# Going back one set of moves (meaning, looking for the mate in FOUR), it takes 37 seconds. And from the original mate in FIVE position, CM9000 did not find the mate in under 10 minutes. This is on a P3-733. Of course, if I am using the "Solve for Mate" feature, it finds the mate in FIVE in three seconds. jm
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