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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