Author: Stuart Cracraft
Date: 12:50:43 09/30/04
Go up one level in this thread
On September 30, 2004 at 09:38:04, Robert Hyatt wrote: >On September 30, 2004 at 00:52:04, Will Singleton wrote: > >>On September 29, 2004 at 23:52:15, Stuart Cracraft wrote: >> >>>[D] 4r1k1/p1qr1p2/2pb1Bp1/1p5p/3P1n1R/1B3P2/PP3PK1/2Q4R w - - bm Qxf4; >>> >>>In this position I had everything turned on and got the solution >>>in a little more than 1 1/2 minutes: >>> >>> 1/11 g2f1 0.01 -953 945 g2f1 f4d5 >>> g2f1 f4d5 >>> 2/12 g2f1 0.01 -953 1644 >>> g2f1 f4d5 c1g5 >>> 3/12 g2f1 0.02 -953 5064 >>> g2f1 f4d5 c1g5 d5f6 >>> 4/20 g2f1 0.09 -953 20655 >>> g2f1 f4d5 b3d5 c6d5 c1c7 d6c7 f1g1 >>> 5/22 g2f1 0.65 -953 168943 >>> g2f1 b5b4 b3a4 f4d5 f6g5 d5e7 >>> 6/26 g2f1 2.59 -953 620310 >>> g2f1 b5b4 mtmt >>> 7/32> g2f1 60.58 -552 14192153 g2f1 e8c8 c1b1 f4d5 b1e4 d6b4 f6e5 c7b6 >>> g2f1 e8c8 c1b1 f4d5 b1e4 d6b4 >>> 7/34 c1f4 99.42 5113 24537823 c1f4 e8e6 f4g5 d7e7 b3e6 e7e6 h1d1 d6e7 f6e7 >>> c1f4 e8e6 f4g5 d7e7 b3e6 e7e6 h1d1 >>> >>> >>>I turned off null move (R=2) and got the solution in about 11 seconds: >>> >>>Alpha=-1332 Beta=-531 Maxdepth=9999999 MaxTime=99999999 >>> 1/11 g2f1 0.01 -953 908 g2f1 f4d5 >>> g2f1 f4d5 >>> 2/12 g2f1 0.01 -953 1565 >>> g2f1 f4d5 c1g5 >>> 3/14 g2f1 0.07 -953 20084 >>> g2f1 f4d5 c1g5 d5f6 >>> 4/22 g2f1 0.60 -953 131543 >>> g2f1 f4d5 b3d5 c6d5 c1c7 d6c7 f1g1 >>> 5/26>g2f1 6.80 -552 1607444 >>> g2f1 b5b4 b3a4 f4d5 f6g5 d5e7 >>> 5/36 c1f4 10.70 2260 2466497 c1f4 d6f4 h4h5 g6h5 h1h5 f4h6 h5h6 c7g3 g2g3 d7d6 >>> >>> c1f4 d6f4 h4h5 g6h5 h1h5 f4h6 h5h6 c7g3 g2g3 d7d >>> >>>So now my question is, would it make sense to consider an idea of >>>disabling null move under additional circumstances if those >>>circumstances can be identified. >>> >>> endgame >>> side to move in check >>> inside principal variation >>> last move a null move >>> >>>These are the ones I disable for -- I don't disable null move for >>>any material-related or alpha/beta related measures but perhaps >>>I should. Are any in common use? >>> >>>Stuart >> >>If the previous move was a piece moving near the enemy king, I don't null move. >>Also, don't null near the leafs. > > >That is a bad idea. That is where most of the _gain_ from null-move happens. I >do it everywhere without this WAC141 problem stuff bothering anything. Do you mean for both near the leafs and enemy king or only one or the other?
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