Author: Uri Blass
Date: 12:41:49 02/04/02
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On February 04, 2002 at 15:00:56, John Merlino wrote: >On February 04, 2002 at 07:41:13, Uri Blass wrote: > >>This position is from the ssdf games(RebelCentury4-Shredder5.32). >> >>[D]8/8/8/3qr2p/4k2P/3p2PK/R7/Q7 w - - 0 79 >>The last move of Shredder was Ke3-e4 >> >>How much time does your program need to see that white wins material after >>ke3-e4? >>Is ke3-e4 the losing blunder in the game? >> >>The game continued 79.Rf2 Qd7+ 80.Kh2 Rf5 81.Qe1+ Kd4 82.Ra2 Qb5 and Shredder >>had to resign at move 121 >> > >CM8000 says that 78...Ke4 was not "losing", and it appears to see a draw after >79.Rf2 Rf5: > >Time Depth Score Positions Moves >0:00 1/3 -0.74 4249 79.Qe1+ Kf5 80.Qf2+ Kg6 81.Ra6+ Re6 >0:00 1/3 0.60 7689 79.Ra4+ Kf5 80.Rd4 Qe6 81.Rxd3 >0:00 1/4 -0.46 14432 79.Ra4+ Kf5 80.Rd4 Qe6 81.Qc1 Kf6+ > 82.Kg2 >0:00 2/5 -0.53 49363 79.Ra4+ Kf5 80.Rd4 Qe6 81.Qd1 Kg6+ > 82.g4 Re3+ 83.Kg2 hxg4 84.Rxg4+ > Kh7 >0:03 2/6 -1.06 266968 79.Ra4+ Kf5 80.Rd4 Qe6 81.Qf1+ > Kg6+ 82.g4 hxg4+ 83.Rxg4+ Kh5 84.Qf3 > Re2 >0:08 2/6 -0.41 575407 79.Rf2 Qd7+ 80.Kh2 Rf5 81.Qe1+ > Kd4 82.Qa1+ Kc4 83.Qa2+ Kb5 84.Qb3+ > Kc6 85.Rb2 >0:17 3/7 -0.32 1325178 79.Rf2 Rf5 80.Qe1+ Kd4 81.Rb2 Qd7 > 82.Rb4+ Kc5 83.Qc3+ Kd6 84.Kh2 > Ke7 85.Re4+ Kf8 86.Qh8+ Kf7 >0:42 4/8 -0.39 3263983 79.Rf2 Rf5 80.Qe1+ Kd4 81.Qa1+ > Kc5 82.Ra2 Qf3 83.Qc3+ Kd5 84.Ra5+ > Ke6 85.Ra6+ Kd7 86.Ra7+ Kd6 87.Qd4+ > Qd5 88.Qb6+ Qc6 89.Qd4+ Ke6 >2:13 5/9 0.00 9916533 79.Rf2 Rf5 80.Qe1+ Kd4 81.Qa1+ > Kc5 82.Ra2 Qf3 83.Qc3+ Kd5 84.Ra5+ > Ke6 85.Ra6+ Kd7 86.Ra7+ Kd6 87.Ra6+ > Kd5 88.Ra5+ >5:10 6/10 0.00 23775970 79.Rf2 Rf5 80.Qe1+ Kd4 81.Qa1+ > Kc5 82.Ra2 Qf3 83.Qc3+ Kd5 84.Ra5+ > Ke6 85.Ra6+ Kd7 86.Ra7+ Kd6 87.Ra6+ > Kd5 88.Ra5+ Yace believes that 81.Qa1+ is wrong based on one of it's lines that was posted in the previous post Here is again one of the lines of yace after 79.Rf2: 79...Rf5 80.Qe1+ Kd4 81.Rb2 Qf3 82.Qb4+ Kd5 83.Qb5+ Kd4 84.Rb4+ Ke3 85.Qb6+ Ke2 86.Rb2+ d2 87.Qe6+ Kf1 88.Rxd2 Rc5 89.Qa6+ ± (0.94) Depth: 12 00:10:13 236574kN yace gives here only 81...Qf3 but some analysis suggests that other lines also bad for black for example:81...Qd7 82.Rb4+ Kc5 83.Qc3+ Kd6 84.Kh2 Uri K Uri
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