Author: Jeremiah Penery
Date: 15:06:02 03/26/99
Go up one level in this thread
On March 26, 1999 at 07:22:29, Matthew Herman wrote: >On March 25, 1999 at 20:31:54, Jeremiah Penery wrote: > >>On March 25, 1999 at 18:48:02, Matthew Herman wrote: >> >>>On March 25, 1999 at 13:13:29, Dann Corbit wrote: >>> >>>>On March 25, 1999 at 08:18:03, Matthew Herman wrote: >>>>[snip] >>>>>>Could you post some EPD positions where computers make the wrong choice? I am >>>>>>*very* interested in this. >>>>> >>>>>1st position : velirimovic attack >>>>>r1b2rk1/2q1bppp/p1npp3/1pnB1N11/4P1P1/2N1B3/PPP1QP1P/2KR2R w - - >>>>>here computer will take on d5 or f5 (both lose). >>>>This one has three rooks for white. Could you post a corrected version? >>>> >>>>>2nd position : Yugoslav Dragon >>>>>3q1rk1/pp1bppbp/3p1np1/8/2rNP1P1/2N1BP2/PPPQ3P/1K1R3R b - - >>>>>Here most computers play the slow a6, b5 and white should develop a strong >>>>>attack with h4-h5, yet programs like junior after a6 play qd3?!. Only Fritz has >>>>>found h4-h5 so far.. I havent tested crafty yet. >>>>> >>>>>There are other positions like this, but these are the 2 main ones I am looking >>>>>at. >>> >>>3 rooks?? Where do you see 3 Rs? one first rank is 2KR2R .. no other ranks that >>>have Rs (for white).. >> >>The material looks fine, but should it be black to move? With white to move, >>Crafty showed something like +5 right away, but I didn't let it search very >>much. >> >>>Also, Qb8 is slow, white will play h4-h5 and get the >>>attack in very quickly, before black has a chance to open up the queenside. >> >>This is what I got from my modified Crafty: >> >>15 209:38 -0.56 1. ... b5 2. h4 b4 3. Nce2 a5 4. Qd3 >> Qc7 5. h5 e5 6. hxg6 exd4 7. gxh7+ >> Kh8 8. Bxd4 Nxh7 9. Bxg7+ Kxg7 10. >> Nd4 >> >>Black's score was dropping with each additional ply. >> >>Jeremiah > >b5 gets ripped to shreds by b3! What comes after? It's showing: 2. ... Rc8 3. h4 b4 4. Nd5 Nxd5 5. exd5 Qa5 6. h5 Qxd5 7. hxg6 fxg6 8. Bh6 Rc3 9. g5 with an eval of +0.23 for black. I'll let it run longer to see if it changes its mind. Also, I'm not sure which incarnation of Crafty this is, as I've been experimenting a lot lately with it - many of my versions hardly seem to play chess sometimes. :) Jeremiah
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