Author: Uri Blass
Date: 07:36:52 02/28/01
Go up one level in this thread
On February 28, 2001 at 10:27:21, Dieter Buerssner wrote: >On February 28, 2001 at 05:56:27, Uri Blass wrote: > >>On February 27, 2001 at 08:24:14, Jorge Pichard wrote: > >>I helped yace by going forward and backward. >> >>yace liked 2.Qxd6 after 1...Qe3 so I had to tell it the moves that it wants to >>play (Re8 h4 h5 Bf3 Qc1+ Kf2 Qd2+ Be2 Qf4+ Kg1 and after playing these moves it >>can see the draw after enough time). >> >>After doing it I went back slowly and it found draw in all moves when only at >>move 3 it found an alternative 3.Qd7+ with 0.09 pawns for white. >> >>I continue to go back. >> >>It needed a long time to see that there is not a good alternative to 2.Qxd6 but >>after enough time it found that 2.Qd7+ has 0.00 evaluation and change its mind >>to 2.Qd6. > >There is no need, to wait a long time here. I assume, that after Yace knew the >score after Qxd6, it switched to Qd7. Yace had no problem to see 2.Qd7 but needed the time to see the draw score for it. Just do the move on the board (i.e. by >adding a variant to the movelist) and use the same method of above - just do the >suggested moves rather fast. A draw score will be shown soon. Then undo the >moves, and the drawscore should propagate back. This took me less than 2 >minutes. > >>I continued to go back and it evaluated 1...Qe3 as +0.09 for white >>Main line >>1...Qe3 2.Qxd6 Re8 3.Qd7+ Re7 4.Qc6 Qxe4 5.d6 Qd3+ 6.Kg1 Re8 7.Kh2 Qxf5 8.Ra2 >>Rd8 9.Qxb5 Rxd6 10.Qxc4+ Kg6 11.Ra7 Kh7 > >I am not sure, if a draw can be prooven after the white Queen is on c6. > >One note to people, that want to try this. Unfortunately, there is a small bug >in the UCI implementation of Yace. It will clear hash tables and the learned >information of subtree analysis, when the position is setup. This was a leftover >from my debugging, so that I could reproduce exact node counts, sorry. This >won't happen, when the game starts from the initial position, i.e. when you load >the whole game. > >Regards, >Dieter I used yace.exe so I guess that this is not a problem in the case of my analysis. Uri
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.