Author: F. Jermann
Date: 04:56:03 04/28/01
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On April 28, 2001 at 01:23:42, Uri Blass wrote: >On April 28, 2001 at 01:11:16, Stephen A. Boak wrote: > >>On April 28, 2001 at 00:58:13, Stephen A. Boak wrote: >> >>Uri, >> >>Here are the figures you wanted. Quite interesting! >> >>Relative Ratings from Fixed Delta Ply Settings: >> >> PLY >> T14 DF DELTA BOTH Games Ave/Ply >>>79.4 -79.4 0 0.0 600 - >>>231.5 53.7 1 142.6 500 143 >>>375.8 190.0 2 282.9 400 141 >>>557.3 372.6 3 464.9 300 155 >>>557.7 614.1 4 585.9 200 146 >>>603.9 798.3 5 701.1 100 140 >> >>The relative rating average, per delta ply, is extremely linear--approx 145 pts >>ave. >> >>Aren't you the mathematician? > >Yes but there is no simple fomula to calculate rating correctly and I did not >know which program to use to calculate it. > >Your data suggest that there is no evidence for diminshing return in the nunn2 >match at small depthes. > >I believe that there is a diminishing return but we need to wait to games at >bigger depthes to prove it. > >Uri Hi Uri, looking at the data, the Tiger data shows a clear diminishing return: 232 - 188 - 186 - 139 - 120 difference/ply. Whereas for Fritz we get 54 - 95 - 124 - 154 - 160 there is an increasing return. Maybe these data are of no statistically relevance, but I think there may also be some difference due to the different approaches Tiger and Fritz use to evaluate the moves. Interestingly, Tiger gains a lot more playing strength per extra ply than Fritz, but I suppose that this is compensated in practical games by the fact that the Tiger needs a lot more extra time per extra ply?? Nevertheless, you are doing an interesting experiment! Maybe we see the diminishing return effect also for Fritz at depth difference of 20 or 30 :-) Have a nice time, Frank
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