Author: Robert Hyatt
Date: 11:36:26 07/24/00
Go up one level in this thread
On July 24, 2000 at 10:40:06, Jeremiah Penery wrote: >[Uri] >The original position - AFTER the proposed Ra8: >>>>>>>[D]r3rk2/1p6/2p3P1/4nP1p/pP2p3/P1B1NbPB/2P5/5RK1 w - - 0 1 > > >[Hyatt] >>>>>>I tried both ways. The score is pretty close to the same either way. After >>>>>>b5, my score is -.8 after 15 plies. After _Rad8_ > >[Uri] >>>The right position is after Rda8 and not after Rad8 because the rook was at d8 >>>in the game. > >[Hyatt] >>I did both. I took the position before Rda8 (where DB liked b5 until the >>last minute) and ran it. I then ran the position after Rda8 where Crafty >>would play Bxe5 almost instantly and never changed it's mind. The score >>was .8 for b5 and 1.0 for Bxe5. I concluded that either move for black is >>about as good as the other, based only on the score... > >I think everyone was getting a bit confused here. Uri gave the position after >the move DB would've made if it didn't fail low (presumably). You then said you >searched _from that position_, and also after b5 (in the same position?). Then >I was confused about the correct position, then you said you ran the correct >position. My mind is going in circles. :P I first searched the position Uri posted. After Rda8. I got a score of -1.0 playing a move for white in response to black playing Rda8. Crafty would have followed Rda8 by playing Bxe5, with a score of +1.00 for white. I then set the position up _prior_ to Rda8 and let Crafty search. I posted that analysis where it played b5, with a score of -.8.... So I searched the position after DB's move Rda8 and got -1.0 for black, and I searched the position before Rda8 for black and crafty chose b5 with a score of -.8... Is that clearer??? IE if Crafty played b5 it would be -.8. Had it played Rda8 it would have been -1.0 although it is possible it isn't that bad, because crafty was searching for a white move, and found Bxe5. And there is some asymmetry that might make the position somewhat better or worse for black, depending on how the asymmetry affected things...
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