Author: Dann Corbit
Date: 18:29:45 04/28/01
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On April 28, 2001 at 20:30:21, Heiner Marxen wrote: >On April 28, 2001 at 18:53:11, Dann Corbit wrote: > >>[D]k7/8/2p1p3/1pR2p2/3N4/1p1B1p2/1Rp1p3/4K3 w - - bm Rxc6; pv Rxc6 f2+ Kxe2 e5 >>Rxb3 e4 Nxb5 exd3+ Kxf2 Kb7 Nd4+ Ka7 Rc4 Ka6 Ra4#; >> >>How long does it take your program to find this mate in 8? > >Hi Dann, > >Chest needs 81 seconds on a K7, 600 MHz (350 MB hash) to find that there >are 3 different key moves to solve the mate in 8. I give a PV for each: > >Bxb5 Kb7 Rxc6 c1=N Bxe2 Nxe2 Rxb3+ Ka7 Rc7+ Ka6 Nc6 f2+ Kxf2 >=*= Ra7# >Rxb3 f2+ Kxe2 c1=B Nxb5 Kb7 Na7+ Kc7 Rxc6+ Kd8 Rb7 f1=B+ Kxf1 >=*= Rc8# >Rxc6 f2+ Kxe2 e5 Nxb5 Kb7 Nd4 Ka7 Rxb3 c1=N+ Rxc1 f1=B+ Rxf1 >=*= Ra1# > >The complete solution tree is much larger. =*= means "any legal move". > >This time you seem to not have used Chest, so let me ask: what did you use, Crafty. >and how long did it take? 1/2 hour. I got curious to know if my intuition about what the best move was was correct for that position I proposed. Therefore, I ran crafty to see if I guessed right.
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