Author: Uri Blass
Date: 16:07:58 08/05/02
Go up one level in this thread
On August 05, 2002 at 17:50:27, Robert Hyatt wrote: >On August 05, 2002 at 12:15:32, J. Wesley Cleveland wrote: > >>On August 05, 2002 at 03:10:07, Jouni Uski wrote: >> >>>[D]8/4rk2/1p2r3/1Pp5/2Pp4/1K1P4/2PQ4/8 w - - >>> >>>Crafty's evalution after 14 ply +1,56. >>> >>>Jouni >> >>Crafty 18.15 static evaluation >>material evaluation................. 1.60 >>development......................... 0.00 >>pawn evaluation..................... -0.04 >>passed pawn evaluation.............. 0.00 >>passed pawn race evaluation......... 0.00 >>king safety evaluation.............. 0.00 >>interactive piece evaluation........ -0.14 >>total evaluation.................... 1.42 >> >> >>Crafty 18.10 static evaluation >>material evaluation................. 0.80 >>development......................... 0.00 >>pawn evaluation..................... -0.04 >>passed pawn evaluation.............. 0.00 >>passed pawn race evaluation......... 0.00 >>king safety evaluation.............. 0.00 >>interactive piece evaluation........ -0.14 >>total evaluation.................... 0.62 >> >>Apparently Bob does believe that Q+P is much better than 2R > > >I believe that in most positions, unless something really unusual is >happening, that a queen is better than two rooks, when the computer has >the queen. As a general rule, the queen can _always_ force a draw, >because of the many checks it can give. And it often finds ways to pick >up a pawn here and there. The exceptions occur when the rooks get doubled >and can't be separated, but even then it is not a bad idea. > >I simply count a queen as equal to two rooks, period... And in 99.9% >of the cases, that is at least correct... and often the queen is >better when there is another piece on the board to help... You do not count it as equal but as better by 0.6 pawns based on the static evaluation. I think that in most positions the queen is not better than 2 rooks. Based on experience of games of movei against opponents there were even a case when movei could draw with 2 rooks against queen and some pawns by perpetual check. I did not see the general rule that the queen can always draw and I remember comp-comp games when movei with the queen lost even against less material. Uri
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