Author: Uri Blass
Date: 16:49:51 03/01/01
Go up one level in this thread
On March 01, 2001 at 19:34:02, Bruce Moreland wrote: >On February 27, 2001 at 08:24:14, Jorge Pichard wrote: > >>I believe that the drawish move was Qe3! instead of the Qxc6? Can somebody >>post the FEN string that produce the graphical position for me. Plus I wonder >>what program save the draw in the shortest time possible? > >PV 00:00:26.812 13 -192 [wrong] Qxc6 dxc6 Kf8 Ra7 Rc8 Rb7 Rd8 Rxb5 Ra8 >PV 00:01:14.078 13 -189 [right] Qe3 >PV 00:02:14.609 13 -108 [right] Qe3 >PV 00:04:18.125 13 -104 [right] Qe3 Qxd6 Re8 h4 h5 Bf3 Qc1+ Kf2 Qd2+ Be2 Qf4+ >Kg1 Qe3+ Kh2 Qf4+ Kh3 Qxf5+ Kh2 Qf4+ Kg1 Qe3+ Kf1 Qc1+ Kf2 Qf4+ Ke1 Qc1+ Bd1 >Qxc3+ Kf1 Qc1 Ra7+ Kg8 Ke2 c3 >PV 00:07:11.734 14 -54 [right] Qe3 Qxd6 Re8 h4 h5 Bf3 Qc1+ Kf2 Qd2+ Be2 Qf4+ >Kg1 Qe3+ Kh2 Qf4+ Kh3 Qxf5+ Kh2 Qf4+ Kg1 Qe3+ Kf1 Qc1+ Kf2 Qf4+ Ke1 Qc1+ Bd1 >Qxc3+ Kf1 Qc1 Ra7+ Kg8 Ke2 c3 >PV 00:24:24.312 14 -30 [right] Qe3 Qd7+ Kg8 Bf3 Kh7 Bh5 Qc1+ Kf2 Qf4+ Kg1 >Qc1+ Kh2 Qf4+ Kh1 Qc1+ Kh2 >PV 01:39:48.406 15 -33 [right] Qe3 Qxd6 Re8 Qd7+ Re7 Qc6 Qxe4 d6 Qd3+ Kg1 Re8 >Ra7+ Kf8 Qc5 Kg8 d7 Rd8 Qb6 Kh7 Qxd8 Qe3+ Kf1 Qxa7 Ke2 >PV 02:25:10.922 16 -36 [right] Qe3 Qxd6 Re8 Qd7+ Re7 Qc6 Qxe4 d6 Qd3+ Kg1 Re8 >Ra7+ Kf8 Qc5 Kg8 d7 Rd8 Qb6 Kh7 Qxd8 Qe3+ Kf1 Qxa7 Qe7 Qa1+ Ke2 >PV 14:39:16.765 17 -30 [right] Qe3 Bf3 Qc1+ Kf2 Qd2+ Be2 Qf4+ Kg1 Qc1+ Kf2 >Qf4+ > >My program finds this move on 1:14 on a quad 450 Xeon, which I admit isn't very >fast. > >But it has a draw score with a perpetual after 24 minutes (ply 14). > >It looks like it lost it in plies 15 and 16, but there's a perpetual in ply 17 >after 14 hours. > >bruce 2 questions: 1)What is the draw line after Qe3 Qxd6 Re8 Qd7+ Re7 Qc6 and if the moves of black are not the best what is the better alternative for black? This triangle of the queen Qc6-d6-d7-c6 was suggested by more than one program and I see that Ferret also liked it at depth 16 but for some reason changed its mind at depth 17. Deep Fritz could not find a draw in this triangle even after a long time. 2)I see score of -30 and repetition in the main line. Is it a draw score? The score suggest that white forced a draw in this line but the question is if white can do better than it. It is possible that white can get a score of 0.27(from Ferret points of view) without repeating the position. Uri
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