Author: Heiner Marxen
Date: 07:09:07 04/11/02
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On April 10, 2002 at 06:33:14, Kim Roper Jensen wrote: >Hi > >Gentlemen start your engines....... :) > >[D]n7/4K3/3N4/3kN3/3P4/4B3/4pP1p/8 w - - > >Shredder 6 Paderborn on dual 1GHz with 256MB Hashtables > > 13.01 0:00 +11.26 1.Ne8 Ke4 (511.340) 760.9 > 14.01 0:01 +11.26 1.Ne8 Ke4 (929.237) 803.8 > 15.01 0:02 +11.26 1.Ne8 Ke4 (1.853.843) 835.4 > 16.01 0:04 +11.26 1.Ne8 Ke4 (3.612.247) 828.6 > 17.01 0:07 +11.26 1.Ne8 Ke4 2.Nd3 (6.457.467) 833.2 > 18.01 0:13 +11.26 1.Ne8 Ke4 2.f4 (11.662.860) 848.2 > 19.01 0:24 +11.26 1.Ne8 Ke4 2.Kd7 (20.703.699) 857.6 > 20.01 1:30 +11.51++ 1.Ne8 Ke4 2.Nf6+ Kf5 3.Nh5 Ke4 4.Ng3+ Kd5 5.Nxe2 Ke4 >6.Ng3+ Kd5 7.f4 Nb6 8.f5 h1Q 9.Nxh1 Ke4 10.f6 Kxe3 11.f7 Nd7 12.Kxd7 Ke2 13.f8Q >(76.896.816) 853.5 > 20.01 1:32 +12.01++ 1.Ne8 Ke4 2.Nf6+ Kf5 3.Nh5 h1N 4.f3 Nf2 (78.445.711) >851.5 > 20.01 2:09 +M12 1.Ne8 Ke4 2.Nf6+ Kf5 3.Nh5 Ke4 4.Ng3+ Kd5 5.Nxe2 Ke4 6.Nc3+ >Kf5 7.Nb5 Ke4 8.Nd6+ Kd5 9.Nd3 Kc6 10.d5+ Kc7 11.Nb4 h1Q 12.Na6+ (111.023.499) >854.5 > 21.01 3:22 +M12 1.Ne8 Ke4 2.Nf6+ Kf5 3.Nh5 Ke4 4.Ng3+ Kd5 5.Nxe2 Ke4 6.Nc3+ >Kf5 7.Nb5 Ke4 8.Nd6+ Kd5 9.Nd3 Kc6 10.d5+ Kc7 11.Nb4 h1Q 12.Na6+ (175.664.572) >868.6 > 22.01 5:32 +M12 1.Ne8 Ke4 2.Nf6+ Kf5 3.Nh5 Ke4 4.Ng3+ Kd5 5.Nxe2 Ke4 6.Nc3+ >Kf5 7.Nb5 Ke4 8.Nd6+ Kd5 9.Nd3 Kc6 10.d5+ Kc7 11.Nb4 h1Q 12.Na6+ (295.046.375) >887.3 >best move: Nd6-e8 time: 8:26.781 min n/s: 897.849 CPU 194.3% nodes: >455.012.961 TB: 305.489 It takes much more time to confirm that this mate is unique and cannot be shortened: on Athlon 1500+ with 128 MB hash and all 4-men and some 5-men EGTBs Chest needs 9.2 hours. Its PV: PV: Ne8 Ke4 Nf6+ Kf5 Nh5 Ke4 Ng3+ Kd5 Nxe2 Ke4 Nc3+ Kf5 Nb5 Ke4 Nd6+ Kd5 Nd3 Kc6 d5+ Kc7 Nb4 h1=Q Na6# Most of the time went into the last level: # 4 0.03s [ 3.00] 3kN [ 7.58] 1.08 653- 0 # 5 0.20s [ 6.67] 23kN [ 7.46] 1.44 4856- 0 % EGTB found tables for max 5 pieces % EGTB uses 3728.4K memory internally # 6 1.21s [ 6.05] 142kN [ 6.07] 1.86 33771- 0 # 7 5.93s [ 4.90] 794kN [ 5.61] 2.29 197341- 0 # 8 29.91s [ 5.04] 4042kN [ 5.09] 2.75 1028620- 248 # 9 152.26s [ 5.09] 19609kN [ 4.85] 3.22 5068403- 1889442 # 10 875.69s [ 5.75] 110543kN [ 5.64] 3.26 29441110- 26241877 # 11 1794.12s [ 2.05] 755709kN [ 6.84] 3.38 200103574- 196904341 # 12 29241.12s [ 16.30] 4064342kN [ 5.38] 3.57 1045223636-1042024403 To find "no mate in 11" was done in half an hour... Somehow this timing looks fishy: over 6 fold the nodes done in only double the time? That 2.05 does not look ok... may be I have some problem with my timing. So, take that with a grain of salt. Cheers, Heiner
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