Author: Bruce Moreland
Date: 15:06:17 01/30/98
Go up one level in this thread
On January 30, 1998 at 14:50:18, Stuart Cracraft wrote: >8/7p/1p2KPb1/p5k1/P1P5/1P6/8/8 b - - 0 1 > >The right move looks to this human to be h5. Only a very >long search saw this for my program and I am wondering what >heuristic I am missing: > >Phase = Endgame, 60 moves in 300 secs, target = 32767 sec, Root score = >828 > 1- 0.0 8 23 Bb1 > 1. 0.1 392 24 Bb1 > 2+ 0.1 828 34 Bb1 > 2. 0.1 108 96 Bb1 Ke5 > 3+ 0.1 492 162 Bc2 > 3. 0.1 108 596 Bc2 Ke5 Kg4 > 4+ 0.1 592 1212 b5 > 4. 0.2 208 2692 b5 Ke5 Kg4 cxb5 > 5+ 0.2 428 7680 Bf7+ > 5. 0.3 108 12337 Bf7+ Kxf7 Kg4 b4 axb4 Kf8 > 6+ 0.4 328 17455 b5 > 6. 0.8 308 40822 b5 f7 bxa4 f8=Q Bf7+ Kxf7 axb3 > 7- 2.2 208 124063 b5 > 7& 2.3 192 132253 b5 f7 Bxf7+ Kxf7 b4 Kf8 Kf4 Ke7 h5 > 7. 2.4 192 136224 b5 f7 Bxf7+ Kxf7 b4 Kf8 Kf4 Ke7 h5 > 8+ 3.8 528 222438 b5 > 8. 6.2 508 381529 b5 f7 Bxf7+ Kxf7 bxa4 bxa4 Kf4 Kf8 h5 >Kg8 > Ke3 > 9- 18.8 408 1163781 b5 > 9& 24.9 28 1524091 b5 cxb5 Kh6 Ke7 Kh5 b4 axb4 f7 Bxf7 > 9& 28.4 108 1735916 h5 c5 h4 cxb6 Bf7+ Kxf7 Kg4 b7 Kf3 b8=R > 9. 33.9 108 2051702 h5 c5 h4 cxb6 Bf7+ Kxf7 Kg4 b7 Kf3 b8=R >10+ 37.7 228 2281466 h5 >10& 47.2 528 2831861 h5 Ke7 h4 f7 Bxf7 b4 Bxc4 bxa5 bxa5 Kd7 >Kg4 > Ke7 >10. 81.9 528 5035141 h5 Ke7 h4 f7 Bxf7 b4 Bxc4 bxa5 bxa5 Kd7 >Kg4 > Ke7 I don't think you are necessarily missing a heuristic, I think it's worse than this, I think you have some kind of horrendous bug. My evidence is that 25 seconds into the search, you are playing 1. ... b5, which manages to *lose*. bruce
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