"Thomas T. Veldhouse" schreef in bericht
...
So, I see that Deep Shredder 9 and 10 are available as 64-bit UCI engines
[and
chessbase may be packaging a 64-bit version in Chessbase protocol as
well].
Has anybody tried these and has there been any notable performance [i.e.
ELO]
increase?

Thanks in advance.

Chessbase has not yet released a 64-bit version of any of their engines,
Fritz and Junior.
Engines like HIARCS and Shredder also released a seperate, 64-bit version.
Several of the marketed engines have 64-bit versions, and also run on
Chessbase software.
For instance, Rybka gets about 50 to 60 % increase in search-power with the
64-bit version.
In engine-games of 10 minutes or so, this means that an increase of
searchdepth of maybe 2 or 3 ply, a total of 12 ply -- 14 ply, in a regular
middlegame.
This is not the same 60% increase, logically, because of search-trees/
increasing deviations.
In ELO, this meant an increase of about 30 to 50 points.