Author: blass uri
Date: 11:15:11 09/01/99
Go up one level in this thread
On September 01, 1999 at 11:28:41, Robert Hyatt wrote: >On September 01, 1999 at 04:55:34, blass uri wrote: > >>r1b1k2r/1pqp1ppp/p1Nbp3/8/4P3/2N5/PPP2PPP/R1BQR1K1 b kq - 0 1 >>avoid Bxh2+ >> >>Junior5 solved this test againsy yudasin at tournament time control but could >>not solve it at faster time control >> > > >Here is my output for this. Crafty doesn't think it is 'good' at all, but >does bounce between that move and dxc6/bxc6 as it searches. By the 1:33 >mark it has decided that this is getting bad enough that it discounts it >and changes for good at depth=13... > >It finally (after finishing depth=13) settles on bxc6. If it has a target >time of 94 seconds (or longer) it won't play Bxh2. In looking at it, Bxh2 >doesn't look horrible, since white has castled and black has not, although >I doubt I would play it myself. GM Yudasin gave Junior the opportunity to play Bxh2+ because yudasin did not think that Bxh2+ is a good move > > > > >>r2q1rk1/pb3ppp/2n5/1pbNP3/2p1Q3/P4N2/BP3PPP/R4RK1 w - - 0 1 >>from Junior-nimzo(wccc) >>find Nf6+ >> > >This is a tactical shot that really has nothing to do with king safety. Unless >you weigh king exposure _way_ high, which will find this move, but will also >find lots of sacrifices that are totally worthless. I do not know about programs that can see in a reasonable time that white is winning more than 3 pawns for a piece so the question if a program can solve it after some minutes is a question of the evaluation of king's safety. sometimes 3 pawns and exposed king for a piece is a good idea and sometimes it is not a good idea and a program with good king safety evaluation should know when it is a good idea and when it is not a good idea. Uri
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