Author: Uri Blass
Date: 08:39:34 12/25/00
Go up one level in this thread
On December 25, 2000 at 10:43:33, Heiner Marxen wrote: >That is not hard. Cited from Chest output: > >CHEST version 3.20, 14-May-2000 >Options = -SLU > >W: Ke6 Qb6 Pd4 Pd5 Pe4 Pe5 Pf4 Pf5 (8) >B: Ka8 Qe3 Rd3 Rf3 Be2 Be1 Nc3 Ng3 Pb3 Pc5 Pc4 Pd6 Pf6 Pg5 Pg4 Ph3 (16) >FEN: k7/8/1Q1pKp2/2pPPPp1/2pPPPp1/1pnrqrnp/4b3/4b3 w - - >analysing (mate in 8 moves): >Solution (in 6 moves): > Ke6 - d7 > > Kd7 Nxd5 exd5 Qxe5 fxe5 Ba5 Qa6+ Kb8 Kc6 =*= Qb7# > Bf2 Kc7 =*= Qb8# > Rc3 Kc7 =*= Qb8# > Rd2 Kc7 =*= Qb8# > b2 Kc7 Ba5 Qxa5# > Rb3 Qa6# > b1=Q Qa6# > b1=R Qa6# > -*- Qb8# > c3 Kc7 =*= Qb8# > -*- Kc7 Ba5 Qxa5# > -*- Qb8# > Ba5 Qa6+ Kb8 Kc6 =*= Qb7# > Bf2 Kc7 =*= Qb8# > Qd2 Kc8 Qb4 Qa6# > -*- Qb8# > Rc3 Kc7 =*= Qb8# > Rd2 Kc7 =*= Qb8# > b2 Kc7 Ba5 Qxa5# > Rb3 Qa6# > b1=Q Qa6# > b1=R Qa6# > -*- Qb8# > c3 Kc7 =*= Qb8# > -*- Kc7 Ba5 Qxa5# > -*- Qb8# > Nb5 Qc6+ Kb8 Qxb5+ Ka7 Kc7 Ba5+ Qxa5# > Ka8 Qb8# > -*- Qb7# > Ka8 Kc7 Ba5+ Qxa5# > Ka7 Qb7# > -*- Qb8# > Ka7 Kc8 =*= Qb7# > Qxe4 Kc8 Qxf5+ e6 Qxe6+ dxe6 =*= Qb8# > -*- Qb8# > -*- Qb8# > Na4 Qa6+ Kb8 Kc6 =*= Qb7# > Nxf5 Kc7 Nb5+ Qxb5 Ba5+ Qxa5# > Ka7 Qb7# > -*- Qb8# > Nxd5+ exd5 Ba5 Qxa5# > -*- Qb8# > -*- Qb8# > Na2 Kc7 Ba5 Qxa5# > -*- Qb8# > Nb1 Kc7 Ba5 Qxa5# > -*- Qb8# > Ncxe4 Kc7 Ba5 Qxa5# > -*- Qb8# > Nd1 Kc7 Ba5 Qxa5# > -*- Qb8# > Qxd4 Kc8 =*= Qb8# > b2 Kc8 b1=Q Qa6# > b1=R Qa6# > -*- Qb8# > -*- Kc6 =*= Qb7# > >end of solution tree (no duals except at top) >Total Time (virt) = 1.980 sec > >(on K7/600) >Legend: =*= is (any legal move) > -*- is (any other legal move) > >That this position is not legal did not matter to Chest. > >Heiner This position is more easy for chest than to other programs. Here is a more hard illegal position(I found that 1.Qa3 is a winning move if you ignore the fact that the position is illegal and this position is the position after 1.Qa3 Kd8): [D]3k4/8/3pKp2/2pPPPp1/2pPPPp1/Qpnrqrnp/4b3/4b3 w - - 0 1 White begins and win. I believe that Chest can also solve this position but it is going to take more time. A possible solution begins with 1.Qa5+ Kc8 2.Qa8+ Kc7 3.Qc6+ Kb8 4.Kd7 I guess that that the position is mate in 10 but I did not check it. Uri
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