Author: Francis Monkman
Date: 15:26:19 05/02/99
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On May 02, 1999 at 15:01:26, blass uri wrote: >Junior cannot find f5 at iterations 17,18(usually eqvivalent to depth 9 in the >brute force search) > >other programs also cannot solve it at depth 9. > >Genius3 shows at depth 7 after 1.f5 hxg5 2.f6 the move Qc7 with positive >evaluation (1.21 pawns for black) >it fail low at depth 8 and shows Qc7 with 0.00 evaluation >main line 2...Qc7 3.fxg7 Kxg7 4.Nh5+ Kg8 5.Nf6+ Kg7 6.Nh5+ with perpetual check. >white can get a decisive advantage in this line by 4.Bg5 > >Genius3 cannot see 3 plies after the original position that white is winning at >depth 8. > >8+3=11 so 11 plies are probably not enough for it to see that white is winning >from the original position. > >The problem of most programs is that they do not smell the mate danger for >black(otherwise they would do more extensions and find a solution at depth 9). > >I believe there are programs that can find the solution at depth 9 >chessmaster and diep(use mate extensions) are the natural candidates. Thanks Uri, I'm expecting a copy of CM6000 so shall try it. My copy of Genius, after f5 hxg5 awards itself a ! for the move f6, which on 6-ply is already making significant improval -- from -2.00 to -1.40 almost immediately -- prompting me to post a 'note to programmers' that this is exactly the kind of thing a 'search monitor' should be looking for. (Also for forcing or restricted lines etc) NB why does Genius find the Berliner mate (19-ply) almost immediately? (Think I'm right) Francis
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