Author: Andrew Williams
Date: 14:36:42 09/15/02
Go up one level in this thread
On September 15, 2002 at 15:38:25, Dieter Buerssner wrote: Hi Dieter, I wish my program could get into positions like this against Tiger! All of these results are on an Athlon 1200. I searched each position for two minutes. > >8/8/4K1p1/4PpB1/3p1P1P/5n2/4k3/8 b - - bm d3; c0 "Nxg5 only draws"; > PostModernist drops Nxg5 at ply 4 and switches to d3. >After d3 Kf7 > >8/5K2/6p1/4PpB1/5P1P/3p1n2/4k3/8 b - - bm d2; c0 "Nxg5 only draws"; > PM drops Nxg5 at ply 2 and switches to d2 >After d2 e6 > >8/5K2/4P1p1/5pB1/5P1P/5n2/3pk3/8 b - - bm d1=Q; c0 "Nxg5 only draws"; > PM doesn't consider Nxg5 here at all. It goes straight for d1=Q. >after d1Q e7 > >8/4PK2/6p1/5pB1/5P1P/5n2/4k3/3q4 b - - bm Qd7; c0 "Nxg5 only draws"; > >After Qd7 Kf8, black has a nice winning line: Nd4 e8Q+ Ne6+ Qxe6+ Qxe6: three >checks in a row. More difficult for engines to win seems Qd7 Bf6 Ke3 Kf8: > PM likes Qd5 until 31 seconds, at which point it switches to Qd7 (ply 13). >5K2/3qP3/5Bp1/5p2/5P1P/4kn2/8/8 b - - bm Kxf4; > >There are more ways to win, and what can happen here: The black side does not >want to give his Q for the pawn, and do many Q moves. In the end, it must give >the Q anyway, and it may very well end in a draw (at least with fast playing, my >engined did this stupid thing). So, I think, Kxf4 is the only convincing >immediate move. > PM likes Qd6 in this position. It has a score of +7.44, but its line suggests it doesn't know how to make progress. >The first position after Nxg5. >[D] 8/8/4K1p1/4Ppn1/3p1P1P/8/4k3/8 w - - > >How does your engine evaluate this position? Are there any engines, that see >something close to draw value (or even say smaller 5 after some time)? > PM is quite clueless about this. It thinks that black is at +8.98. Even after three minutes, PM says +6.44 for Black. Andrew
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