Author: Mike Byrne
Date: 13:27:08 02/23/03
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On February 23, 2003 at 16:23:16, Mike Byrne wrote: >Ruffian , among others, like Shredder 7, gets confused by this position, It >thinks it's mate in 18 for black and plays Kxd7 -- which, unfortunately leads to >a Mate in 18 for BLACK!. The problem here is that the EGTB does not recognizing a mate in 18 for WHITE after Kxd7?? >castling rights and the program is not examining them either. > >Proper play is Kd8 and black mates in 18 > >[d] 2k5/3P4/8/8/8/8/1r5p/R3K3 b Q - 0 1 > >Ruffian 1.0.1 analysis > >New game >2k5/3P4/8/8/8/8/1r5p/R3K3 b Q - 0 1 > >Analysis by Ruffian 1.0.1: > >1. -+ (-#17): 1...Kxd7 2.0-0-0+ Ke6 3.Kxb2 Kf5 >2. -+ (-#18): 1...Kd8 2.Ra8+ Kxd7 > >(Byrne, Secane, PA USA 23.02.2003) > >Proper Analysis: > > >If black plays Kxd7, then it is mate for white in 18 with 0-0-0 as shown by >Fritz 8. > > >[d]8/3k4/8/8/8/8/1r5p/R3K3 w Q - 0 1 > >Analysis by Fritz 8: > >1. +- (#18): 2.0-0-0+ Ke6 3.Kxb2 Ke5 4.Kc3 >2. -+ (-#16): 2.Ra7+ Kc6 3.Rh7 h1Q+ 4.Rxh1 Rb1+ > >(Byrne, Secane, PA USA 23.02.2003)
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