Author: Dan Honeycutt
Date: 14:36:16 09/29/04
Go up one level in this thread
On September 29, 2004 at 16:06:36, Uri Blass wrote: >On September 29, 2004 at 14:51:16, Dan Honeycutt wrote: > >>On September 29, 2004 at 14:16:23, Stuart Cracraft wrote: >> >>[snip] >>> >>>WAC 141 takes me a shade over 24,000,000 nodes, a fully completed 7 ply search, >>>to find Qxf4 with all the above improvements, still the same amount of >>>time as without: >>> >>>Alpha=-1332 Beta=-532 Maxdepth=9999999 MaxTime=1410065407 >>> 1/11 g2f1 0.00 -953 945 g2f1 f4d5 >>> g2f1 f4d5 >>> 2/12 g2f1 0.01 -953 1653 >>> g2f1 f4d5 c1g5 >>> 3/12 g2f1 0.02 -953 5073 >>> g2f1 f4d5 c1g5 d5f6 >>> 4/20 g2f1 0.09 -953 19924 >>> g2f1 f4d5 b3d5 c6d5 c1c7 d6c7 f1g1 >>> 5/22 g2f1 0.71 -953 170357 >>> g2f1 b5b4 b3a4 f4d5 f6g5 d5e7 >>> 6/26 g2f1 2.85 -953 617222 >>> g2f1 b5b4 mtmt >>> 7/32> g2f1 56.60 -553 13644478 g2f1 e8c8 c1b1 f4d5 b1e4 d6b4 f6e5 c7b6 >>> g2f1 e8c8 c1b1 f4d5 b1e4 d6b4 >>> 7/34 c1f4 97.33 5113 24161497 c1f4 e8e6 f4g5 d7e7 b3e6 e7e6 h1d1 d6e7 f6e7 >>> c1f4 e8e6 f4g5 d7e7 b3e6 e7e6 h1d1 >>> 8/34 c1f4 115.59 5113 27838968 >>> c1f4 e8e6 f4g5 d7e7 b3e6 e7e6 h1d1 >>> 9/34> c1f4 197.37 5513 48705672 >>> c1f4 e8e6 f4g5 d7e7 b3e6 e7e6 h1d1 mtmt >>> 9/... still searching >>> >>>Stuart >> >>Doesn't look like the program has actually found Qxf4. e8e6 is not the next >>move. >> >>Dan H. > >The next move is not important > >Every move is losing and the question what is the next move in the program pv is >dependent on extensions. > >It is clear that too many extensions were used because the program needs so many >nodes to finish depth 7 and the selctive depth is too high(depth 7/34). > >I believe that the recapture extension that is used is bad if it helps to solve >the problem at depth 7 with so many nodes but the only test to be sure is games. > >Uri >Uri If it finds the right move for the wrong reason I'd worry that something is wrong with the search. Most programs don't like throwing away their queen (and then a rook to boot) unless they find a good reason - like mate. Dan H.
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