Author: Ernst A. Heinz
Date: 04:44:29 11/21/97
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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; >5k2/8/7P/8/8/8/K6P/1B6 w - - id"B-h7 - Wrong Bishop" bm b1h7; >8/7p/6p1/3k4/B5PP/8/8/1K6 w - - id"a4e8 - Wrong Bishop" bm a4e8; >8/6p1/8/3kP2P/6K1/8/8/2b5 w - - id"h5-h6 - Wrong Bishop" bm h5h6; >8/8/pp6/3b2K1/1P6/PN2k3/8/8 w - - id"Na5 draw - Wrong Bishop" bm b3a5; > >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? DarkThought/WMCCC'97 on a 500MHz Alpha-21164a solves them all: 1: 12 sec 2: 0 sec 3: 29 sec (prefers the also winning g5! over Be8!) 4: 0 sec 5: 79 sec =Ernst=
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