Author: Roy Brunjes
Date: 07:11:58 01/25/04
Go up one level in this thread
On January 24, 2004 at 19:26:34, Harald Faber wrote: >Shredder 8 again turnrs +3 (move #35) into a lost position, which Junior 8 >despite being very deep in the tbs does not find the mate in opposite to >Shredder 8. > >>>>> snip ... <<<<< >Instead of 63...Te1? the alternative 63...Ta1 would have led to Junior's win as >Shredders analysis shows: > >[D]4N3/8/P7/4p1k1/8/3K4/8/r7 w - - 0 64 > >Analysis by Shredder 8: >64.Sc7 Kf4 65.Se6+ Kf5 66.Sc7 e4+ 67.Ke2 Ta2+ 68.Kf1 Kf4 69.Ke1 >-+ (-4.43) Tiefe: 13/24 00:00:02 98kN, tb=5481 >64.Sc7 Kf4 65.Se6+ Kf5 66.Sc7 e4+ 67.Ke2 Ta2+ 68.Kf1 Kf4 69.Ke1 Kf3 70.Kd1 Ta1+ >71.Kd2 e3+ 72.Kc2 >-+ (-4.68) Tiefe: 14/24 00:00:02 109kN, tb=6355 >64.Sc7 Kf4 65.Se6+ Kf5 66.Sc7 e4+ 67.Kc2 Kg4 68.Kb3 e3 69.Sd5 e2 70.Sb4 >-+ (-5.18) Tiefe: 14/27 00:00:03 123kN, tb=7540 >64.Sc7 Kf4 65.Se6+ Kf5 66.Sc7 e4+ 67.Kd2 Ta2+ 68.Kd1 Kf4 69.Sd5+ Kf3 70.Sb4 Ta1+ >71.Kc2 e3 72.Kb2 Ta5 73.Sa2 >-+ (-5.44) Tiefe: 14/33 00:00:05 216kN, tb=12570 >64.Ke4 Ta5 65.Sc7 Kf6 >-+ (-5.12) Tiefe: 14/33 00:00:05 217kN, tb=12595 >64.Ke4 Ta5 65.Sd6 Kf6 66.Se8+ Ke7 67.Sc7 Kd7 68.Kf5 >-+ (-5.01) Tiefe: 14/33 00:00:05 220kN, tb=12959 >64.Ke4 Ta5 65.Sc7 Kf6 66.Kd3 Ke7 67.Kd2 >-+ (-7.44) Tiefe: 15/15 00:00:05 221kN, tb=12970 >64.Ke4 Ta5 65.Sc7 Kf6 66.Kd3 Ke7 67.Kd2 Kd7 68.a7 Kxc7 >-+ (-#150) Tiefe: 15/15 00:00:05 221kN, tb=12975 >64.Ke4 Ta5 65.Sc7 Kf6 66.Kd3 Ke7 67.Ke4 Kd7 68.Sd5 Kd6 69.Sf6 Txa6 70.Se8+ Kd7 >71.Sg7 Ta5 >-+ (-#32) Tiefe: 15/22 00:00:05 237kN, tb=15249 >64.Sc7 Kf4 65.Se6+ Kf5 66.Sc7 e4+ 67.Kd2 Ta2+ 68.Kd1 Kf4 >-+ (-#32) Tiefe: 15/24 00:00:08 298kN, tb=21708 >64.Sc7 Kf4 65.Se6+ Kf5 66.Sc7 e4+ 67.Ke3 Ta2 68.Kd4 Ta3 69.Kc4 e3 70.Sd5 e2 >71.Se7+ Ke4 72.Kb5 e1D 73.Sc6 >-+ (-12.28) Tiefe: 15/33 00:00:12 480kN, tb=31033 >64.Sc7 Kf4 65.Se6+ Kf5 66.Sc7 e4+ 67.Ke3 Ta2 68.Kd4 Ta3 69.Kc4 e3 70.Sd5 e2 >71.Se7+ Ke4 72.Kb4 Ta2 73.Sc6 e1D+ >-+ (-12.31) Tiefe: 16/35 00:00:15 664kN, tb=38682 >64.Sc7 Kf4 65.Se6+ Kf5 66.Sc7 e4+ 67.Ke3 Ta2 68.Kd4 Ta3 69.Kc4 e3 70.Kb5 e2 >71.Se8 e1D 72.Sd6+ Kf4 73.Kc4 >-+ (-12.56) Tiefe: 17/31 00:00:15 686kN, tb=40193 >64.Sc7 Kf4 65.Se6+ Kf5 66.Sc7 e4+ 67.Ke3 Ta2 68.Kd4 Ta3 69.Kc4 e3 70.Kb5 e2 >71.Se6 e1D 72.Sg5 >-+ (-13.06) Tiefe: 17/31 00:00:15 704kN, tb=40872 >64.Sc7 Kf4 65.Se6+ Kf5 66.Sc7 e4+ 67.Ke3 Ta2 68.Kd4 Ta3 69.Kc4 e3 70.Sd5 e2 >71.Se7+ Ke4 72.Sc6 Ke3 73.Kb5 Ta4 74.Kxa4 >-+ (-13.06) Tiefe: 17/35 00:00:19 1060kN, tb=51181 >64.Sc7 Kf4 65.Se6+ Kf5 66.Sc7 e4+ 67.Ke3 Ta2 68.Kd4 Ta3 69.Kc4 e3 70.Kd5 e2 >71.Se8 e1D 72.Kd6 >-+ (-13.31) Tiefe: 18/34 00:00:19 1102kN, tb=53474 >64.Sc7 Kf4 65.Se6+ Kf5 66.Sc7 e4+ 67.Ke3 Ta2 68.Kd4 Ta3 69.Kc4 e3 70.Kd5 e2 >71.Se6 e1D 72.Kd4 >-+ (-13.81) Tiefe: 18/34 00:00:19 1130kN, tb=54748 >64.Sc7 Kf4 65.Se6+ Kf5 66.Sc7 e4+ 67.Ke3 Ta2 68.Kd4 Ta3 69.Kc4 e3 70.Sd5 e2 >71.Se7+ Ke4 72.Sc6 e1D 73.a7 Dc3+ 74.Kb5 Kd5 >-+ (-14.24) Tiefe: 18/37 00:00:29 1767kN, tb=79161 >64.Sc7 Kf4 65.Se6+ Kf5 66.Sc7 e4+ 67.Ke3 Ta2 68.Kd4 Ta3 69.Kc4 e3 70.Sd5 e2 >71.Se7+ Ke4 72.Kb5 e1D 73.Kc4 >-+ (-14.49) Tiefe: 19/35 00:00:30 1824kN, tb=81691 >64.Sc7 Kf4 65.Se6+ Kf5 66.Sc7 e4+ 67.Ke3 Ta2 68.Kd4 Ta3 69.Kc4 e3 70.Sd5 e2 >71.Se7+ Ke4 72.Kb4 Txa6 73.Kb5 Ta8 74.Kc6 e1D 75.Sd5 >-+ (-14.52) Tiefe: 19/38 00:00:41 3001kN, tb=114801 >64.Sc7 Kf4 65.Se6+ Kf5 66.Sc7 e4+ 67.Ke3 Ta2 68.Kd4 Ta3 69.Kc4 e3 70.Sd5 e2 >71.Se7+ Ke4 72.Kb4 Txa6 73.Kc4 e1D 74.Kb3 >-+ (-14.77) Tiefe: 20/32 00:00:41 3079kN, tb=117885 >64.Sc7 Kf4 65.Se6+ Kf5 66.Sc7 e4+ 67.Ke3 Ta2 68.Kd4 Ta3 69.Kc4 e3 70.Sd5 e2 >71.Se7+ Ke4 72.a7 e1D 73.Sc6 Dc3+ 74.Kb5 Tb3+ 75.Sb4 Dxb4+ 76.Kc6 Dc3+ 77.Kd6 >Df6+ 78.Kd7 >-+ (-15.27) Tiefe: 20/39 00:00:42 3309kN, tb=120320 >64.Sc7 Kf4 65.Se6+ Kf5 66.Sc7 e4+ 67.Ke3 Ta2 68.Kd4 Ta3 69.Kc4 e3 70.Sd5 e2 >71.Se7+ Ke4 72.Sc8 e1D 73.Sd6+ Ke3 74.Kd5 Kf4 75.a7 Txa7 76.Kc4 Da5 >-+ (-15.30) Tiefe: 20/39 00:00:59 5507kN, tb=168773 >64.Sc7 Kf4 65.Se6+ Kf5 66.Sc7 e4+ 67.Ke3 Ta2 68.Kd4 Ta3 69.Kc4 e3 70.Sd5 e2 >71.Se7+ Ke4 72.a7 e1D 73.a8D+ Txa8 74.Kb3 Tb8+ 75.Ka3 >-+ (-15.55) Tiefe: 21/43 00:01:01 5845kN, tb=175117 >64.Sc7 Kf4 65.Se6+ Kf5 66.Sc7 e4+ 67.Ke3 Ta2 68.Kd4 Ta3 69.Kc4 e3 70.Sd5 e2 >71.Se7+ Ke4 72.a7 e1D 73.Sf5 Kxf5 74.Kb5 >-+ (-16.05) Tiefe: 21/43 00:01:02 6079kN, tb=180075 >64.Sc7 Kf4 65.Se6+ Kf5 66.Sg7+ Kg6 67.Se8 Txa6 >-+ (-#29) Tiefe: 21/43 00:02:16 28085kN, tb=558672 >64.Ke4 Ta5 65.Sc7 Kf6 66.Kd3 Ke7 67.Ke4 Kd7 68.Sd5 Kd6 69.Sf6 Kc5 >-+ (-#29) Tiefe: 21/43 00:02:29 30727kN, tb=604015 >64.Ke4 Ta5 65.Sc7 Kf6 66.Kd3 Ke7 67.Ke4 Kd7 68.Sd5 Kd6 69.Sf6 Txa6 >-+ (-#32) Tiefe: 21/43 00:02:35 32052kN, tb=633177 >64.Ke4 Ta5 65.Sc7 Kf6 66.Kd3 Ke7 67.Ke4 Kd7 68.Sd5 Kd6 69.Sf6 Txa6 >-+ (-#32) Tiefe: 22/38 00:02:46 34016kN, tb=664099 >64.Ke4 Ta5 65.Sc7 Kf6 66.Kd3 Ke7 67.Ke4 Kd7 68.Sd5 Kd6 69.Sf6 Txa6 >-+ (-#32) Tiefe: 23/40 00:03:34 46856kN, tb=823628 >64.Ke4 Ta5 65.Sc7 Kf6 66.Kd3 Ke7 67.Ke4 Kd7 68.Sd5 Kd6 69.Sf6 Txa6 >-+ (-#32) Tiefe: 24/42 00:05:00 75750kN, tb=954878 >64.Ke4 Ta5 65.Sc7 Kf6 66.Kd3 Ke7 67.Ke4 Kd7 68.Sd5 Kd6 69.Sf6 Txa6 >-+ (-#32) Tiefe: 25/46 00:08:18 147748kN, tb=1175256 >64.Ke4 Ta5 65.Sc7 Kf6 66.Kd3 Ke7 67.Ke4 Kd7 68.Sd5 Kd6 69.Sf6 Txa6 >-+ (-#32) Tiefe: 26/48 00:12:07 204682kN, tb=1548144 >64.Ke4 Ta5 65.Sc7 Kf6 66.Kd3 Ke7 67.Ke4 Kd7 68.Sd5 Kd6 69.Sf6 Txa6 >-+ (-#32) Tiefe: 27/52 00:27:58 531359kN, tb=3218107 Curiously, Chessmaster 9000 with no TB support in its search (meaning it can only use TBs when the actual position on the board occurs within the TBs) finds the right move (... Ra1) in quite reasonable time on my somewhat slow laptop: Analysis by CM9000 [Personality = SKR] Pentium IV 1.6 GHz Time Depth Score Positions Moves 2:28 8/15 -1.38 26255700 63...Rf4 64.Nc7 Ra4 65.Ne6+ Kf5 66.Nc5 e4+ 67.Kc3 Ra3+ 68.Kb4 Ra2 69.Kb3 Ra1 70.Na4 e3 71.a7 e2 72.a8=Q Rb1+ 73.Nb2 e1=Q 74.Qd5+ Kf6 3:04 8/15 -2.94 33445901 63...Ra1 64.Ke4 Ra5 65.Nc7 Kf6 66.Kd3 Ke7 67.Ke4 Kd7 68.Nd5 Kd6 69.Ne3 Rxa6 70.Nf5+ Ke6 71.Ng7+ Kf6 3:13 9/16 -2.94 35399503 63...Ra1 64.Ke4 Ra5 65.Nc7 Kf6 66.Kd3 Ke7 67.Ke4 Kd7 68.Nd5 Kd6 69.Nc3 Rxa6 70.Nb5+ Kc5 71.Nc7 Rc6 4:51 10/17 -3.03 55008729 63...Ra1 64.Ke4 Ra5 65.Nc7 Kf6 66.Kd3 Ke7 67.Ke4 Kd7 68.Nd5 Kd6 69.Nc3 Rxa6 70.Nb5+ Kc6 71.Nc3 Ra3 72.Nd5 Kd6 It surely is not up to spotting any mates yet in this position, and likely would not spot a mate in 32, but it appears to have a better understanding of this position than Junior 8 does with its TBs in full use. Curious ... Roy
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