Author: Roy Eassa
Date: 10:15:45 03/08/02
Go up one level in this thread
On March 08, 2002 at 12:49:33, John Merlino wrote: >On March 08, 2002 at 09:22:58, Ed Schröder wrote: > >>[d]4r3/p1p1pPp1/P1P1P1P1/5K2/3p2P1/7p/3P1ppr/3R1nkq w - - id M19; >> >>I came across this beauty, mate in 19 moves. Rebel has no clue. >> >>Ed > >It takes Chessmaster 8000 (PIII-733) a very long time to get a clue, but it >finally does: > >Time Depth Score Positions Moves >0:00 5/10 0.00 24924 1.fxe8=Q d3 2.Qxe7 >0:00 6/11 0.00 68383 1.fxe8=Q d3 2.Qxe7 >0:02 7/12 0.00 195175 1.fxe8=Q d3 2.Qxe7 >0:05 8/13 0.00 527108 1.fxe8=Q d3 2.Qxe7 >0:14 9/14 0.00 1522431 1.fxe8=Q d3 2.Qxe7 >0:35 10/15 0.00 3817520 1.fxe8=Q d3 2.Qxe7 >1:37 11/16 0.00 10838089 1.fxe8=Q d3 2.Qxe7 >4:05 12/17 0.00 26518345 1.fxe8=Q d3 2.Qxe7 >10:48 13/18 0.00 67843935 1.fxe8=Q d3 2.Qxe7 >28:53 14/19 0.00 178029195 1.fxe8=Q d3 2.Qxe7 >51:41 14/19 Mate19 321927260 1.fxe8=N d3 2.Nf6 gxf6 3.Kf4 f5 > 4.g7 fxg4 5.g8=N g3 6.Nf6 exf6 > 7.e7 f5 8.Kg5 f4 9.e8=N f3 10.Nd6 > cxd6 11.c7 d5 12.c8=N d4 13.Nb6 > axb6 14.a7 b5 15.a8=N b4 16.Nb6 > b3 17.Nc4 b2 18.Ne5 b1=Q 19.Nxf3# > >jm John, it's very impressive that CM8000 can find this at all. The problem involves numerous (five) underpromotions, as late as move 15. The whole thing is 37 ply. I would have thought no PC-based program could get it in any human-reasonable amount of time. Under an hour on a relatively slow PC is very good, IMHO. Kudos to CM!
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