Author: John Merlino
Date: 18:35:19 12/29/03
Go up one level in this thread
On December 29, 2003 at 20:44:06, Sune Fischer wrote: >[D]8/6pk/4Q2p/3P1P1q/8/6P1/4rP2/2R3K1 w - - 0 56 > >In the actual game Frenzee played d6!? and went on to win. > >In post mortem analysis it switches to Re1 with a bit more time, still >sacrificing the queen. > >I've been playing a little bit with the eval scores for passed pawns >and not surprisingly the position is very sensitive to these changes. > >Any other engines who wants to sacrifice the queen here, is it sound >or a lucky punch? > >-S. Chessmaster 9000, default personality on a P4-2.4, waffles quite a bit on the position. And it does, between 1:03 and 1:41, select Re1. At 2:29, it finally sees d6 and sticks with it: Time Depth Score Positions Moves 0:00 1/7 1.66 89140 56.Qd7 Qf3 57.Rf1 Re5 58.d6 Rd5 59.Re1 Rxf5 0:00 1/8 1.37 157219 56.Qd7 Qf3 57.Rf1 Re5 58.d6 Rxf5 59.Qc8 Rh5 60.Qc2+ Kg8 0:02 2/9 1.17 508475 56.Qd7 Qf3 57.Rf1 Re5 58.f6 Qxf6 59.Qb5 Qf5 60.Rd1 Qc2 61.Rd4 Re7 0:04 2/9 1.26 912577 56.Qb6 Qxf5 57.Qd4 Re4 58.Qd2 Re5 59.d6 Rd5 60.Qb4 Kg6 0:09 3/10 1.00 1984480 56.Qb6 Rd2 57.Qa5 Qe2 58.Qc5 Qe5 59.Qb6 Qxf5 60.d6 Qg6 61.Rc6 Qf6 0:11 3/10 1.19 2436013 56.Qd7 Qf3 57.Rf1 Re5 58.f6 Qxf6 59.Qb5 Qf5 60.Rd1 Qf3 61.Qb1+ Rf5 62.Qc2 0:19 4/11 0.85 4483919 56.Qd7 Qf3 57.Qa7 Rd2 58.Qe3 Qxd5 59.Qe6 Qxe6 60.fxe6 Re2 61.Rc6 Kg6 62.Kf1 0:23 4/11 0.93 5484487 56.Qb6 Rd2 57.Qb1 Rxd5 58.f6+ Qf5 59.Qxf5+ Rxf5 60.fxg7 Rf7 61.f4 Kxg7 62.Kf2 h5 63.Ke3 0:45 5/12 0.94 10615245 56.Qb6 Rd2 57.Qb1 Rxd5 58.f6+ Qf5 59.Qxf5+ Rxf5 60.fxg7 Rf7 61.Rc4 Rxg7 62.Rf4 Rd7 63.Kg2 Kg6 1:03 5/12 1.82 15249674 56.Re1 Rxe6 57.fxe6 Kg8 58.d6 Kf8 59.Rc1 g6 60.e7+ Kf7 61.Re1 Qb5 62.e8=Q+ Qxe8 63.Rxe8 Kxe8 64.Kg2 Kd7 1:09 6/13 0.60 17011768 56.Re1 Rxe6 57.fxe6 Kg8 58.d6 Kf8 59.Rc1 g6 60.Rc8+ Kg7 61.d7 Qd1+ 62.Kh2 Qh5+ 63.Kg2 Qd5+ 64.f3 Qa2+ 65.Kg1 Qa1+ 66.Kh2 Qa2+ 67.Kh1 1:41 6/13 0.96 24543465 56.Qb6 Rd2 57.Qb1 Rxd5 58.f6+ Qf5 59.fxg7 Qxb1 60.Rxb1 Kxg7 61.Rb7+ Kf6 62.Rb6+ Kg7 63.f4 h5 64.Kf2 Kf7 65.Rb7+ Ke6 2:29 6/13 2.78 37513299 56.d6 Rxe6 57.fxe6 Qg5 58.Rf1 Qe5 59.e7 h5 60.Rd1 Qe2 61.Rd4 Qe1+ 62.Kg2 h4 63.d7 h3+ 64.Kxh3 Qe6+ 65.Kg2 3:02 7/14 3.01 46466620 56.d6 Rxe6 57.fxe6 Qg5 58.Rf1 Qe5 59.e7 h5 60.Rd1 Qe2 61.Rd4 h4 62.d7 Qe1+ 63.Kg2 h3+ 64.Kxh3 Qe6+ 65.Kh2 Qh6+ 66.Kg2 The hard part is, of course, seeing that White will be a rook ahead after 18 plies. jm
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