Author: John Merlino
Date: 18:44:44 05/15/03
Go up one level in this thread
On May 15, 2003 at 20:07:23, Mike Byrne wrote: >On May 15, 2003 at 19:55:53, John Merlino wrote: > >>On May 15, 2003 at 19:44:07, Mike Byrne wrote: >> >>>> >>>>[d]8/8/8/4np1K/1NN2k2/1R6/1P5P/3n4 w - - 0 1 >>>> >>>>Ipaq running Chess Genius is faster than many programs running on a dual 1.7 Ghz >>>>....amazingly... >>>> >>>>try it yourself... >>> >>>Tiger is one of the strongest if not, the strongest programs around -- it amazes >>>me it takes 4:43 on o 1.7 Ghz. >>> >>>Many other program are as long or longer -- position must be very tricky for >>>programs... >> >>CM9000, default personality, on a P3-733, needs 0:37 to find the mate in FOUR >>after forcing 1.Nc4 Nd7: >> >>Time Depth Score Positions Moves >>0:00 1/3 14.54 3764 2.Nd3+ Ke4 3.Nd6+ Kf3 4.Rxf5+ Ke2 >> 5.Nc4 >>0:00 1/3 20.05 18976 2.Nd2 Nc5 3.Rxc5 Nc3 4.Rbxc3 >>0:00 1/4 20.21 33253 2.Nd2 Nc5 3.Rxc5 Nc3 4.Rcxc3 Ke5 >> 5.Nd3+ Kf6 6.Nf4 >>0:01 1/5 20.32 124987 2.Nd2 Nc5 3.Rxc5 Nc3 4.Rcxc3 Ke5 >> 5.Re3+ Kd6 6.Rbd3+ Kc7 7.Re7+ Kb6 >>0:02 1/6 21.21 318729 2.Nd2 Nc5 3.Rxc5 Nc3 4.Rcxc3 Ke5 >> 5.Rc5+ Kf6 6.Rf3 Ke6 7.Rcxf5 >>0:05 1/7 Mate08 741567 2.Nd2 Nf6+ 3.Kh4 Nc3 4.Rxc3 Nd5 >> 5.Nxd5+ Ke5 6.Nc4+ Ke6 7.Re3+ Kd7 >> 8.Re7+ Kd8 9.Ra8# >>0:08 1/7 Mate05 1150075 2.Rg3 Nxb2 3.Nd6 Nf6+ 4.Kg6 Nd5 >> 5.Rxd5 Nc4 6.Rxf5# >>0:08 2/8 Mate05 1170108 2.Rg3 Nxb2 3.Nd6 Nf6+ 4.Kg6 Nd5 >> 5.Rxd5 Nc4 6.Rxf5# >>0:10 3/9 Mate05 1492154 2.Rg3 Nxb2 3.Nd6 Nf6+ 4.Kg6 Nd5 >> 5.Rxd5 Nc4 6.Rxf5# >>0:15 4/10 Mate05 2410371 2.Rg3 Nxb2 3.Nd6 Nf6+ 4.Kg6 Nd5 >> 5.Rxd5 Nc4 6.Rxf5# >>0:26 5/11 Mate05 4505529 2.Rg3 Nf6+ 3.Kg6 Nd5 4.Rxd5 Ke4 >> 5.Nd6+ Kf4 6.Rxf5# >>0:37 5/11 Mate04 6152533 2.Re5 Nf6+ 3.Kh4 Nxb2 4.Rbe3 Nxc4 >> 5.Nd3# >>0:37 6/12 Mate04 6218332 2.Re5 Nf6+ 3.Kh4 Nxb2 4.Rbe3 Nxc4 >> 5.Nd3# >>0:38 7/13 Mate04 6254153 2.Re5 Nf6+ 3.Kh4 Nxb2 4.Rbe3 Nxc4 >> 5.Nd3# >> >>However, from the initial position, The King cannot find the mate in 5 in under >>10 minutes. Fascinating position.... >> >>jm > try Re3 followed by Nxe3 from the start in the diagram... I guess we're all getting a little confused here. You mentioned that forcing the moves 1.Nc4 Nd7 2.Re5 Nxe5 from the INITIAL position was a difficult mate in THREE for Tiger and others to find. I was simply stating above that I only needed to force 1.Nc4 Nd7 for CM9000 to find the mate in FOUR in 0:37. If I force all four moves (1.Nc4 Nd7 2.Re5 Nxe5), CM9000 finds the mate in THREE 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# Is this what you were asking? jm
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