Author: Robert Hyatt
Date: 20:36:36 11/01/98
Go up one level in this thread
On November 01, 1998 at 23:21:09, James Long wrote: > >In the following position (from ECE3100), why is Ra1 >better than Ra2+? > >position 0001 >R7/8/8/8/3K4/8/3kp3/8 W - - 0 1 > >solution is Ra1 > >10... 17.25 626760 1.900 Ra2+ Kd1 Kd3 e1=N+ Ke3 Nc2+ Kf2 Kd2 > Rb2 Kd1 Rb1+ Kd2 Rh1 Kd3 Kf1 > >my move is ...Ra2+ >[wrong][-][-][36730][10.00] > > >I ran the initial position, along with the position after Ra1 >and the position after Ra2+ through my program's eval with >the following output: > > > BLACK >R - - - - - - - >- - - - - - - - >- - - - - - - - >- - - - - - - - >- - - K - - - - >- - - - - - - - >- - - k p - - - >- - - - - - - - > WHITE > >castling rights :na >e.p. square :na >white to move >Imbalance: 4000 max ks: 1000 max pos: 1000 >endgame >mop up, white to mate >mop up score: 992 > > BLACK >- - - - - - - - >- - - - - - - - >- - - - - - - - >- - - - - - - - >- - - K - - - - >- - - - - - - - >R - - k p - - - >- - - - - - - - > WHITE > >castling rights :na >e.p. square :na >black to move >Imbalance: 4000 max ks: 1000 max pos: 1000 >endgame >mop up, white to mate >mop up score: 992 > > BLACK >- - - - - - - - >- - - - - - - - >- - - - - - - - >- - - - - - - - >- - - K - - - - >- - - - - - - - >- - - k p - - - >R - - - - - - - > WHITE > >castling rights :na >e.p. square :na >black to move >Imbalance: 4000 max ks: 1000 max pos: 1000 >endgame >mop up, white to mate >mop up score: 992 > > > >As you can see, my poor program desperately needs endgame >knowledge. I've put it off way too long. Problem is, *I* >don't have any endgame knowledge!!! Help is greatly >appreciated. > >--- >James something seems wrong here. Ra1 is a draw, as is Ra2+... so I don't see why the suite would have one but not the other... Not to mention nearly any other move... IE white can pass, let black play e1=Q, then check at a2, then check at a1 and draw... seems strange...
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