Author: Carlos del Cacho
Date: 13:30:35 03/17/01
Go up one level in this thread
On March 17, 2001 at 12:21:45, Sune Larsson wrote: > > [D]8/2R5/k7/P7/2PK4/8/1P2r3/8 w - - 0 1 > > > This position was sent to me just two hours ago (thanks!) > White has a won position but must avoid the last trap, > which is 1.b4?? and a draw. The programs I have tried > sees this but in different speed. (PIII 800) > > Deep Fritz 0 sec > Nimzo 8 2 " > Hiarcs 7.32 2 " > Crafty 18.03 20 " > Fritz 5.32 48 " > > > Test: 1) Does your program realize that 1.b4?? is a draw? > 2) How much time needed? > > Sune Pepito takes 38 seconds on my K6-II 400 Mhz and then it falls into a move ordering paranoia :-) 1 568 37 1 b4 1 568 37 27 b4 2 558 38 121 b4 Te2-e6 3 558 39 742 b4 Te2-e4 Rd4-d5 Te4-f4 4 546 41 1706 b4 Te2-e4 Rd4-d5 Te4-e5 Rd5-d6 Te5-e4 5 546 45 5475 b4 Te2-e4 Rd4-d5 Te4-e5 Rd5-d6 Te5-e6 Rd6-c5 Te6-e4 6 541 51 14305 b4 Te2-e4 Rd4-d5 Te4-e5 Rd5-d6 Te5-e6 Rd6-c5 Te6-e5 Rc5-c6 Te5-e4 7 541 64 33998 b4 Te2-e4 Rd4-d5 Te4-e5 Rd5-d6 Te5-e6 Rd6-c5 Te6-e5 Rc5-c6 Te5-e4 8 536 92 78600 b4 Te2-e4 Rd4-d5 Te4-e5 Rd5-d6 Te5-e6 Rd6-c5 Te6-e5 Rc5-c6 Te5-e4 Rc6-d7 Te4-f4 9 513 207 241443 b4 Te2-e4 Rd4-c3 Te4-e3 Rc3-c2 Te3-e2 Rc2-d3 Te2-e3 Rd3-d2 Te3-e2 Rd2-d1 Te2-d2 Rd1-e1 Td2-e2 Re1-f1 Te2-d2 10 513 347 469557 b4 Te2-e4 Rd4-c3 Te4-e3 Rc3-c2 Te3-e2 Rc2-d3 Te2-e3 Rd3-d2 Te3-e2 11 510 614 886509 b4 Te2-e4 Rd4-c3 Te4-e3 Rc3-c2 Te3-e2 Rc2-d3 Te2-e3 Rd3-d2 Te3-e2 Rd2-c1 Te2-c2 Rc1-d1 Tc2-d2 Rd1-e1 Td2-e2 Re1-f1 Te2-b2 12 458 831 1224340 b4 ?? Te2-e4 Rd4-c3 Te4-e3 Rc3-c2 Te3-e2 Rc2-d3 Te2-e3 Rd3-d2 Te3-e2 Rd2-c1 Te2-c2 Rc1-d1 Tc2-d2 Rd1-e1 Td2-e2 Re1-f1 Te2-b2 12 242 3796 5145263 Rd4-d5 Te2xb2 Tc7-c8 Tb2-b3 Tc8-a8 Ra6-b7 Ta8-e8 Tb3-a3 a6 Ta3xa6 Te8-e7 Rb7-c8 c5 Ta6-a5 Rd5-d4 12 316 5396 7410113 Tc7-f7 Te2xb2 Rd4-c5 Tb2-e2 Tf7-f3 Te2-g2 Tf3-f1 Tg2-g4 Tf1-f2 Tg4-g3 Tf2-a2 Tg3-c3 12 318 6115 8437890 Tc7-c8 Te2xb2 Rd4-c3 Tb2-a2 Tc8-d8 Ra6-b7 Td8-d5 Ta2-a4 Td5-b5 Rb7-c6 12 344 7279 10211662 b3 Ra6xa5 Tc7-a7 Ra5-b4 Rd4-d3 Te2-g2 Ta7-b7 Rb4-a3 b4 Ra3-b3 c5 Tg2-g3 Rd3-d2 Rb3-c4 c6 12 349 7448 10466751 Rd4-c3 Ra6xa5 Tc7-c5 Ra5-b6 Tc5-b5 Rb6-c6 Rc3-d3 Te2-g2 b4 Tg2-g3 Rd3-c2 Tg3-g2 Rc2-c3 Tg2-g3 Rc3-d2 Tg3-b3 Rd2-c2 12 349 7524 10577096 Rd4-c3 Ra6xa5 Tc7-c5 Ra5-b6 Tc5-b5 Rb6-c6 Rc3-d3 Te2-g2 b4 Tg2-g3 Rd3-c2 Tg3-g2 Rc2-c3 Tg2-g3 Rc3-d2 Tg3-b3 Rd2-c2 13 380 12330 17585347 Rd4-c3 Ra6xa5 b4 Ra5-b6 Tc7-g7 Te2-e3 Rc3-d4 Te3-e1 Interrupting search... Time spent: 139.21 Depth reached: 13 PV: [380] Rd4-c3 Ra6xa5 b4 Ra5-b6 Tc7-g7 Te2-e3 Rc3-d4 Te3-e1 Nodes per second: 141369.15488015 Interior nodes: 8037035 Quiescent nodes: 11642966 First_success: 2069173/2530170 (81.780 %). BranchingFactor: 3.750 Null-moves: 1340732/2236487 (59.948 %). Hash hits: 4079448/8037035 (50.758 %). EGTB hits: 116135/124758 (93.088 %). Pawn Hash hits: 11642613/11642983 (99.997 %). Futility cut-offs: 478499. IID: 0. Evals: 11642983. Lazy: 4282554. (36.782 %) Extensions: CHK 1559350. MRL 47249. RCP 129577.
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