Author: Martin Slowik
Date: 04:21:55 03/31/05
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Hi Michael, ahh, thanks. The ole' guys didn't use the nullmove technique, I suppose? At least not for mate problems. On March 31, 2005 at 07:14:33, Mike Byrne wrote: >for Crafty, this is a null move issue >without nullmove >White(2): sel 0 0 >null move disabled. >White(2): 8/8/2B1N3/3rp3/4k2K/7Q/2r3Pn/1b1N4 w - - 0 1 >White(1): g > clearing hash tables > time surplus 59.69 time limit 1:00 (1:00) > depth time score variation (1) > 9 25.91 Mat05 1. Kh5 Ba2 2. Kh6 Bb3 3. Kh7 Ba2 4. > Kh8 Rxc6 5. Nf2# (s=11) > time=1:00 cpu=90% mat=2 n=239754768 fh=99% nps=4.00M > ext-> chk=32710476 cap=244696 pp=7141 1rep=1055756 mate=0 > predicted=2 nodes=239754768 evals=14097651 50move=0 > endgame tablebase-> probes=101 hits=2 > SMP-> split=634 stop=19 data=5/64 cpu=54.38 elap=1:00 > >mate in 5 moves. Phew: ~240Mn in 26 sec. Not bad. Your R30 uses only a fraction to get that solution. :) And as a human you see: all black pieces are either blocked, pinned or have to protect mates in 1, except the Bb1. White only needs to get his queen to h7 -- if possible in one move, so the gentleman has to get out of Her Highness way. R30 Regards, Martin
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