Author: Richard A. Fowell (fowell@netcom.com)
Date: 22:58:01 02/17/99
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On February 17, 1999 at 01:05:24, Dann Corbit wrote: >Here is an example where a mate solver shines. >1B6/4QK2/r3P3/5kNn/2N1pr2/3P2pP/4Rq2/3n1R2 w - - id "C.A.P.250024"; ce 32762; >pv dxe4+ Rxe4 Qc5+ Re5 Qxe5# > >Did you see Nf3! immediately? The program I was using found a certain mate, but >Nf3 is faster. And really, really pretty. > >Beautiful, isn't it? > >I used Problemiste to solve it. It uses foreign notation so a knight is S, not >N. Easy to figure out though. MacChess 5.01 sees Nf3! in less than 1 second on my Mac 7300/180. Here's the log file: 02/01|00:00:00| 2977|+M3 | dxe4+ Rxe4 Qc5+ Re5 Qxe5+ 03/01|00:00:00| 5113|+M3 | dxe4+ Rxe4 Qc5+ Re5 Qxe5+ 04/01|00:00:00| 13542|+M3 | dxe4+ Rxe4 Qc5+ Re5 Qxe5+ 05/01|00:00:00| 22500|+M3 | dxe4+ Rxe4 Qc5+ Re5 Qxe5+ 05/13|00:00:00| 44896|+M2 | Nf3 Qxf1 Qc5+ MacChess runs at about 150,000 nps on my machine, so this is probably about 1/3 second. Richard A. Fowell
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