Author: Vincent Diepeveen
Date: 12:41:45 03/09/02
Go up one level in this thread
On March 08, 2002 at 10:12:07, Uri Blass wrote: >On March 08, 2002 at 09:22:58, Ed Schröder wrote: > >>[d]4r3/p1p1pPp1/P1P1P1P1/5K2/3p2P1/7p/3P1ppr/3R1nkq w - - id M19; >> >>I came across this beauty, mate in 19 moves. Rebel has no clue. >> >>Ed > >I could solve it by my head in some minutes(I used the program only as a >chessboard to go backward and forward) > >I believe that this position should be easy for computers if people only write >the right programs(something that I did not do). > >singular extension may help but they should be implemented correctly in order >not to do the program significantly slower in other positions. i get the impression you don't know exactly what singular extensions are. a singular extension is if 1 move is better by a margin S than all other moves in that position. However here we talk about giving the opponent 1 legal move. >1.fxe8N d3 2.Nf6 gxf6(exf6 do the solution shorter) 3.g5 fxg5 4.g7 g4 5.g8N g3 >6.Nf6 exf6 7.Kg6 f5 8.e7 f4 9.e8N f3 10.Nd6 cxd6 11.c7 d5 12.c8N d4 13.Nb6 axb6 >14.a7 b5 15.a8N b4 and here white can choose between 16.Nc7 and 16.Nb6 > >Uri
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