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[Kai Laskos]

Adam, what are you using for 2^n*time versus 1*time used at short controls? I played a bit with fixed ply games for n+1 versus n plies some half a year ago, my impression is that the unrelated engines have pretty unique behaviour with respect to increased depth, I thought of inventing "mostly search similarity tool" (in contrast to mostly eval Sim03 tester, if I understood something) based on the shape of the Elo increase.

Here is the picture for Houdini 1.5 (if I found the correct file)



For StockFish 2.1




I had some results for IvanHoe, which was closer in its shape to Houdini than to StockFish.


The Branching Factor of Houdini 1.5 with respect to depth:



So, it seems that the delta Elo with the depth decreases (with some bumping odd-even plies), and with respect with the number of doublings in time decreases even further, because BF slowly increases.

Kai