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Subject: Re: Very Tough Mate in 4 for Some Engines

Author: Koundinya Veluri

Date: 02:27:50 03/28/03

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On March 27, 2003 at 21:12:39, William Kerr wrote:

>[D]8/3p1p2/5Ppp/K2R2bk/4pPrr/6Pp/4B2P/3N4 w - - bm Nc3;id #1097 mate in 4
>very-very tough;
>
>
>Very tough mate in 4 for some engines.
>
>This position may have been posted before.
>

That's a nice null move killer to add to my list. King of Kings has no problem
with it.

 8     794       34          100000 [++] Ne3 d6 fxg5 hxg5 gxh4 Kxh4 Nxg4 e3
                                         Rxd6
 8     844       35          102189      Ne3 d6 fxg5 hxg5 gxh4 Kxh4 Nxg4 Kh5
                                         Rxd6
 9     844       97          302797      Ne3 d6 fxg5 hxg5 gxh4 Kxh4 Nxg4 Kh5
                                         Rxd6
 9     908       97          302925 [++] Ne3 d6 fxg5 hxg5 gxh4 Kh6 Nxg4+
 9     917      115          365434      Ne3 d6 fxg5 hxg5 gxh4 Kxh4 Nxg4 Kh5
                                         Nf2+ Kh4 Nxe4
 9   99999      167          555211 [++] Nc3 d6
 9  100004      170          559373      Nc3 d6 Bd1 e3 Ne2 Rxf4 Nxf4#
10  100004      301          943854      Nc3 d6 Bd1 e3 Ne2 Rxf4 Nxf4#

Koundinya



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