Author: Peter Kappler
Date: 15:05:43 06/19/00
Go up one level in this thread
On June 19, 2000 at 17:19:42, Will Singleton wrote: >On June 19, 2000 at 04:37:18, Peter Kappler wrote: > >>On June 19, 2000 at 03:58:01, Will Singleton wrote: >> >>>In a game tonight on ICC, Amateur declined to sac for the attack, and played >>>14.Bg3. But I think it's ok to take the pawn, so I was disappointed to see >>>this. What do other progs do? >>> >>>[D]1rbq1rk1/2pp1p2/2n2n1p/1p2p1p1/4P2B/1BPP1N2/2P2PPP/R2Q1RK1 w - g6 >>> >> >> >>That's *really* funny - I was about to post the same position! >> >>By the way, this was an extremely valuable game for me, because it helped me >>find a rather huge bug in Grok's king safety that caused it to play 13...g5 and >>some of the ridiculous king moves that followed. >> >>Grok likes Nxg5 after 8 seconds (ply 8) with an equal score. After 2 minutes >>the score jumps to +0.5. >> >>Phalanx (always brilliant in these types of positions) finds it in under 4 >>seconds with a score of +2. >> >>Fritz6a finds it in 30 seconds, at +0.6. After 100 seconds it's at +1.34 >> >>Chess System Tal 2 finds it in 4 seconds with a +2.2 score. Very similar to >>Phalanx! >> >>Crafty sticks with Bg3. I gave up after 3 minutes. >> >> >>Conclusion: Nxg5 looks very strong to me! >> >>--Peter > >Thanks for the info. Am surprised to hear that Crafty and Fritz6a have some >trouble. Crafty in particular must be doing something wrong not to see this. > >Nice to see Grok playing again. Re those king moves, I thought that was some >sort of new attack scheme you were trying. Happened in a couple of the 4 games. > Sorry to hear it was just a bug :) > >An older version of Amateur will take the pawn. The new one seems to like the >fact that your pawns are bad, and wants to leave them that way! So I have some >adjusting to do. > >Will Hi Will, I wouldn't go and tweak your king safety too much. Although Nxg5 is very attractive, Bg3 might not be that much worse as long as it is followed-up with h4, like Amateur played in the game. As for Crafty, I'm reminded of a position that was posted here a few months ago featuring a strong "piece-for-two-pawns" sacrifice with Bxh6. I recall that most programs found it pretty quickly, but Crafty seemed to never like it. Seems that it is is very conservative in some of its king safety scoring. --Peter
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