Author: Robert Hyatt
Date: 21:58:49 11/20/97
Go up one level in this thread
On November 20, 1997 at 23:55:56, Howard Exner wrote: >Here are 5 positions to test on your computer programs. The theme >is how to play when the bishop is the opposite color of the queening >square. > >k7/pp6/8/P7/3K4/P7/P4B2/8 w - - id"a3-a4 - Wrong Bishop" bm a3 a4; not found in 3 minutes on my P5/233 notebook. /8/8/8/K6P/1B6 w - - id"B-h7 - Wrong Bishop" bm b1h7; found instantly: depth time score variation (1) 7 0.24 6.46 Bh7 Ke7 h4 Kf8 h5 Kf7 Bf5 7-> 0.41 6.46 Bh7 Ke7 h4 Kf8 h5 Kf7 Bf5 8 0.58 6.31 Bh7 Ke7 h4 Kf8 h5 Kf7 Kb3 Kf6 8-> 0.93 6.31 Bh7 Ke7 h4 Kf8 h5 Kf7 Kb3 Kf6 9 1.14 6.51 Bh7 Ke7 h4 Kf7 h5 Kf8 Kb3 Kf7 Bf5 9-> 1.59 6.51 Bh7 Ke7 h4 Kf7 h5 Kf8 Kb3 Kf7 Bf5 10 1.90 6.46 Bh7 Ke7 h4 Kf7 h5 Kf8 Ka3 Ke7 Bf5 Kf7 10-> 2.54 6.46 Bh7 Ke7 h4 Kf7 h5 Kf8 Ka3 Ke7 Bf5 Kf7 11 3.15 6.56 Bh7 Ke7 h4 Kf8 h5 Kf7 Kb3 Kf8 Kc4 Kf7 Bf5 11-> 3.91 6.56 Bh7 Ke7 h4 Kf8 h5 Kf7 Kb3 Kf8 Kc4 Kf7 Bf5 12 4.65 6.57 Bh7 Ke7 h4 Kf8 h5 Kf7 Ka3 Kf8 Kb3 <HT> 12-> 5.81 6.57 Bh7 Ke7 h4 Kf8 h5 Kf7 Ka3 Kf8 Kb3 <HT> 13 6.84 6.61 Bh7 Ke7 h4 Kf8 h5 Kf7 Kb3 Kf8 Kc4 Ke7 Kd5 Kf7 Bf5 13-> 8.25 6.61 Bh7 Ke7 h4 Kf8 h5 Kf7 Kb3 Kf8 Kc4 Ke7 Kd5 Kf7 Bf5 14 9.63 6.61 Bh7 Ke7 h4 Kf8 h5 Kf7 Kb3 Kf8 Kc4 Kf7 Kd5 Ke7 Bf5 Kf7 14-> 11.47 6.61 Bh7 Ke7 h4 Kf8 h5 Kf7 Kb3 Kf8 Kc4 Kf7 Kd5 Ke7 Bf5 Kf7 15 13.73 6.63 Bh7 Ke7 h4 Kf8 h5 Kf7 Kb3 Kf8 Kc4 Kf7 Kd5 Ke7 Bf5 Kf7 Be6+ Kf6 15-> 16.07 6.63 Bh7 Ke7 h4 Kf8 h5 Kf7 Kb3 Kf8 Kc4 Kf7 Kd5 Ke7 Bf5 Kf7 Be6+ Kf6 16 16.73 ++ Bh7!! 16 19.50 13.22 Bh7 Ke7 h4 Kf8 Kb3 Kf7 Kc4 Kf6 Kd5 Kf7 Ke5 Kf8 Kf6 Ke8 Kg7 Kd7 16-> 24.02 13.22 Bh7 Ke7 h4 Kf8 Kb3 Kf7 Kc4 Kf6 Kd5 Kf7 Ke5 Kf8 Kf6 Ke8 Kg7 Kd7 17 24.14 ++ Bh7!! 17 32.58 14.53 Bh7 Ke7 h4 Kf8 Kb3 Kf7 Kc4 Kf6 Kd5 Kf7 Ke5 Kf8 Kf6 Ke8 Bf5 Kd8 h7 Kc7 h8=Q 17-> 37.59 14.53 Bh7 Ke7 h4 Kf8 Kb3 Kf7 Kc4 Kf6 Kd5 Kf7 Ke5 Kf8 Kf6 Ke8 Bf5 Kd8 h7 Kc7 h8=Q 18 46.52 14.53 Bh7 Ke7 h4 Kf8 Kb3 Kf7 Kc4 Kf6 Kd5 Kf7 Ke5 Kf8 Kf6 Ke8 Be4 Kd7 h7 Kc7 h8=Q Kd6 18-> 53.48 14.53 Bh7 Ke7 h4 Kf8 Kb3 Kf7 Kc4 Kf6 Kd5 Kf7 Ke5 Kf8 Kf6 Ke8 Be4 Kd7 h7 Kc7 h8=Q Kd6 19 53.80 ++ Bh7!! 19 54.20 1/13 Bh7 >8/7p/6p1/3k4/B5PP/8/8/1K6 w - - id"a4e8 - Wrong Bishop" bm a4e8; 11 1:01 2.59 Kc2 Ke4 Kd2 Kf4 g5 Kg3 Ke3 Kxh4 Kf4 Kh3 Bc6 11 1:31 3.28 Be8 Ke5 h5 Kf4 hxg6 hxg6 Bd7 Ke5 Kc2 Kd6 Bb5 Ke5 11-> 1:32 3.28 Be8 Ke5 h5 Kf4 hxg6 hxg6 Bd7 Ke5 Kc2 Kd6 Bb5 Ke5 12 1:40 3.33 Be8 Ke5 h5 Kf4 hxg6 hxg6 Bd7 Ke5 Ka1 Kd6 Bb5 Kd5 Bd3 >8/6p1/8/3kP2P/6K1/8/8/2b5 w - - id"h5-h6 - Wrong Bishop" bm h5h6; 11 58.76 ++ h6!! 11-> 1:00 -3.05 h6 Bxh6 Kf5 12 1:08 ++ h6!! 12-> 1:09 -2.76 h6 Bxh6 Kf5 13 1:22 ++ h6!! 13 1:27 0.00 h6 Bxh6 Kf5 g5 e6 Kd6 Kf6 g4 e7 Bg5+ Kxg5 <EGTB> 13-> 1:29 0.00 h6 Bxh6 Kf5 g5 e6 Kd6 Kf6 g4 e7 Bg5+ Kxg5 <EGTB> 14 1:43 0.00 h6 Bxh6 Kf5 g5 e6 Kd6 Kf6 g4 e7 Bg5+ Kxg5 <EGTB> 14-> 1:45 0.00 h6 Bxh6 Kf5 g5 e6 Kd6 Kf6 g4 e7 Bg5+ Kxg5 <EGTB> 15 2:06 0.00 h6 Bxh6 Kf5 g5 e6 Kd6 Kf6 g4 e7 Bg5+ Kxg5 <EGTB> 15-> 2:09 0.00 h6 Bxh6 Kf5 g5 e6 Kd6 Kf6 g4 e7 Bg5+ Kxg5 <EGTB> 16 2:45 0.00 h6 Bxh6 Kf5 g5 e6 Kd6 Kf6 g4 e7 Bg5+ >8/8/pp6/3b2K1/1P6/PN2k3/8/8 w - - id"Na5 draw - Wrong Bishop" bm b3a5; not solved within 3 minutes either.. > >The first three are wins and the last two are draws. > >I tested these on Rebel 8. The results are: > >K6-233 60Mb Hash > >1. Not solved by 15:00 >2. 0:51 >3. 0:16 >4. 0:21 >5. Not solved by 15:00 > >Problems 1 and 5 are difficult for Rebel 8. A known issue >with Rebel 8 is it's difficulty with doubled pawns on the a >or h files. An old Maresch test position uncovered this. > >Could others post some of there results for these 5 problems. >Maybe 1 and 5 are difficult for all programs?
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