Author: Slater Wold
Date: 18:56:09 10/09/01
Go up one level in this thread
On October 09, 2001 at 21:41:39, Dann Corbit wrote: >On October 09, 2001 at 21:07:50, Slater Wold wrote: > >>On October 09, 2001 at 13:01:13, Uri Blass wrote: >> >>>[D]8/1P6/8/5k2/2K4p/7r/1r4p1/6R1 b - - 0 61 >> >>PFGA: EPD record: 1 ID: Mate in 10 >>end-game phase >> clearing hash tables >> time surplus 0.00 time limit 60:00 (60:00) >> nss depth time score variation (1) >>starting thread 1 >> 8 0.30 -13.71 1. ... Rhb3 2. b8=Q Rxb8 3. Kd4 R8b4+ >> 4. Kd3 h3 5. Kc3 Ke5 >> 8-> 0.50 -13.71 1. ... Rhb3 2. b8=Q Rxb8 3. Kd4 R8b4+ >> 4. Kd3 h3 5. Kc3 Ke5 >> 9 0.56 ++ 1. ... Rhb3!! >> 9 1.51 -21.26 1. ... Rxb7 2. Kc5 Rc3+ 3. Kd6 Rd7+ >> 4. Kxd7 Rc1 5. Ke8 Rxg1 6. Kf8 h3 7. >> Ke7 >> 9 2.17 -25.54 1. ... Rc3+ 2. Kxc3 Rxb7 3. Ra1 g1=Q >> 4. Ra5+ Qc5+ 5. Kd3 Qxa5 6. Kd4 Qd2+ >> 7. Kc5 h3 >> (3) 9-> 2.22 -25.54 1. ... Rc3+ 2. Kxc3 Rxb7 3. Ra1 g1=Q >> 4. Ra5+ Qc5+ 5. Kd3 Qxa5 6. Kd4 Qd2+ >> 7. Kc5 h3 >> 10 2.28 ++ 1. ... Rc3+!! >> (2) 10 2.76 -Mat29 1. ... Rc3+ 2. Kxc3 Rxb7 3. Kc2 Rb1 >> 4. Rxg2 <HT> >> (4) 10-> 5.81 -Mat29 1. ... Rc3+ 2. Kxc3 Rxb7 3. Kc2 Rb1 >> 4. Rxg2 <HT> >> (3) 11 6.94 -Mat29 1. ... Rc3+ 2. Kxc3 Rxb7 3. Kc2 Rb1 >> 4. Rxg2 <HT> >> (4) 11-> 20.92 -Mat29 1. ... Rc3+ 2. Kxc3 Rxb7 3. Kc2 Rb1 >> 4. Rxg2 <HT> >> (3) 12 22.80 -Mat28 1. ... Rc3+ 2. Kxc3 Rxb7 3. Kc2 h3 >> 4. Ra1 g1=Q 5. Ra5+ Qc5+ 6. Rxc5+ <HT> >> 12 45.97 -Mat26 1. ... Rxb7 2. Rxg2 Rc3+ 3. Kd4 Rd7+ >> 4. Kxc3 <HT> >> 12-> 1:09 -Mat26 1. ... Rxb7 2. Rxg2 Rc3+ 3. Kd4 Rd7+ >> 4. Kxc3 <HT> >> 13 1:34 -Mat26 1. ... Rxb7 2. Rxg2 Rc3+ 3. Kd4 Rd7+ >> 4. Kxc3 <HT> >> (4) 13-> 3:34 -Mat26 1. ... Rxb7 2. Rxg2 Rc3+ 3. Kd4 Rd7+ >> 4. Kxc3 <HT> >> (3) 14 4:10 -Mat26 1. ... Rxb7 2. Rxg2 Rc3+ 3. Kd4 Rd7+ >> 4. Kxc3 <HT> >> time=60:01 cpu=201% mat=-6 n=1997089692 fh=99% nps=554k >> ext-> chk=982088492 cap=1699772 pp=7904550 1rep=95009627 mate=2916 >>26 >> predicted=0 nodes=1997089692 evals=35885390 >> endgame tablebase-> probes done=630737 successful=155980 >> hashing-> trans/ref=56% pawn=99% used=-70% >> SMP-> split=1410 stop=156 data=10/32 cpu=121:12 elap=60:01 >>Black(1): >> >>6+ billion nodes. And nothing. >> >>It sat from 4:10 to 60:01 looking at Rg3. > >This is a really interesting position for that reason. We could call it "the >ugly mate spawning factory" because the pretty ten move mate is a real tussle to >find, and the ugly ones fall out like virulent pustules of contamination. >;-) It truly is amazing. Computers are *SO* smart, they can find a mate in 33, 29, 26...........but not 10. :) > >In 5 years, this great horror will go away. That's because wonder engines like >Chest will be fast enough to solve problems like this on one of the free cpu >chips from the cluster on the wafer in your computer. For now, we'll just have >to suffer it, unless Paul tells us his secret. >;-) I'd _LOVE_ a copy of Chest. Even on 1 cpu, this is 7x what Uri tried it on. Might be amazing how fast it finds it.
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