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Subject: Re: 010 - mate in 20 moves!

Author: Roy Eassa

Date: 08:56:18 09/05/02

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On September 04, 2002 at 06:24:35, Paul wrote:

>On September 04, 2002 at 02:34:48, Eduard Nemeth wrote:
>
>>[D]B2k4/KPpP4/n1Pb4/P5p1/5p2/5P2/8/8 b - - 0 1
>>
>>Which program see a mate in 20 moves?
>>
>>Eduard
>
>Hi Eduard,
>
>My program Pretz (with slightly changed extensions), on a p3/1000, says this:
>
>00:45 BM20 15 Nb8 Kxb8 Bc5 a6 Bd4 a7 g4 fxg4 f3 g5 f2 g6 f1=Q g7 Bxa7+ Kxa7 Qa1+
>Kb8 Qxg7 Ka7 Qa1+ Kb8 Qb1 Ka7 Qb6+ Kb8 Qxc6 Ka7 Qa4+ Kb8 Qxd7 Ka7 Qd4+ Kb8 Ke7
>Kxc7 Qd6+ Kc8 Qd8#
>
>groetjes,
>Paul


My result (manually & using Shredder) is slightly different, but the same in the
essential parts.

1...Nb8 2.Kxb8 Bc5 3.a6 g4 4.a7 Bg1 5.fxg4 f3 6.g5 f2 7.g6 f1Q 8.g7 Bxa7+ 9.Kxa7
Qa1+ 10.Kb8 Qxg7 11.Ka7 Qa1+ 12.Kb8 Qe5 13.Ka7 Qc5+ 14.Kb8 Qxc6 15.Ka7 Qa4+
16.Kb8 Qxd7 17.Ka7 Qd4+ 18.Kb8 Ke7 19.Kxc7 Qd6+ 20.Kc8 Qd8#


Here is what you give, with move numbers added for clarity:

1...Nb8 2.Kxb8 Bc5 3.a6 Bd4 4.a7 g4 5.fxg4 f3 6.g5 f2 7.g6 f1=Q 8.g7 Bxa7+
9.Kxa7 Qa1+ 10.Kb8 Qxg7 11.Ka7 Qa1+ 12.Kb8 Qb1 13.Ka7 Qb6+ 14.Kb8 Qxc6 15.Ka7
Qa4+ 16.Kb8 Qxd7 17.Ka7 Qd4+ 18.Kb8 Ke7 19.Kxc7 Qd6+ 20.Kc8 Qd8#



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