Author: John Merlino
Date: 12:12:44 08/27/05
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On August 27, 2005 at 14:55:29, Normand M. Blais wrote: >Hi, > >Two versions of my program playing against each other produce the game below. >The final position made me wonder. Why is Black resigning? The obvious answer is >because I instructed the program to resign when the score is lower than a 1000 >points (value of the Queen). In fact, it is mate in 9 moves. > >[D]1n2q3/7p/p4rp1/3Q4/2P2pNk/4BR2/2P4P/7K b - - 5 45 Actually, assuming Black plays the optimum 45...Rf5, White has a mate in 8 moves. Here is what The King says: Time Depth Score Positions Moves 0:00 1/3 1.79 2486 45...Rf5 46.Qd4 Nc6 0:00 1/4 8.37 14588 45...Rf5 46.Rh3+ Kxh3 47.Qf3+ Kh4 48.Bf2+ Kg5 49.h4+ Kh5 50.Nf6+ Kh6 51.Nxe8 0:00 1/5 Mate09 25877 45...Rf5 46.Rh3+ Kxh3 47.Qg2+ Kh4 48.Nf6 Rg5 49.Qf2+ Kh3 50.Qf1+ Kh4 51.Bf2+ Rg3 52.Bxg3+ fxg3 53.Qf4+ Kh3 54.Qxg3# 0:00 1/5 22.62 45170 45...Qe4 46.Qxe4 Rf5 47.Nh6 Kg5 48.Bxf4+ Kf6 49.Nxf5 gxf5 50.Bxb8 0:00 1/6 Mate06 61550 45...Qe4 46.Qxe4 Rf5 47.Nh6 Kg5 48.Qe7+ Kxh6 49.Rh3+ Rh5 50.Bxf4+ g5 51.Qxg5# 0:00 1/6 Mate09 81129 45...Rf5 46.Rh3+ Kxh3 47.Qg2+ Kh4 48.Nf6 Rg5 49.Qf2+ Kh3 50.Qf1+ Kh4 51.Bf2+ Rg3 52.Bxg3+ fxg3 53.Qf4+ Kh3 54.Qxg3# 0:00 1/7 Mate08 125967 45...Rf5 46.Rh3+ Kxh3 47.Qg2+ Kh4 48.Nf6 Rg5 49.Qf2+ Kh3 50.Qf3+ Rg3 51.Qf1+ Kh4 52.Qxf4+ Kh3 53.Qxg3# 0:01 1/8 Mate08 249834 45...Rf5 46.Rh3+ Kxh3 47.Qg2+ Kh4 48.Nf6 Rg5 49.Qf2+ Kh3 50.Qf3+ Rg3 51.Qf1+ Kh4 52.Qxf4+ Kh3 53.Qxg3# 0:02 1/9 Mate08 543856 45...Rf5 46.Rh3+ Kxh3 47.Qg2+ Kh4 48.Nf6 Rg5 49.Qf2+ Kh3 50.Qf3+ Rg3 51.Qf1+ Kh4 52.Qxf4+ Kh3 53.Qxg3# jm
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