On Thu, 22 Dec 2011, Joseph Heled wrote:
I am not sure which nets and which sigmoid implementation is used by
gnubg now - but note that my nets were trained against an
approximation. It does not matter that much if you use the exact
definition - what is important is using a "valid pair", that is a net
and the sigmoid implementation it was trained with.
In the past, breaking this meant a serious drop in move quality. I
suggest someone checks this ....
As far as I understand, the non-SSE sigmoid approximation in gnubg is the
same as the one in gnubg-nn (the default code in the latter, with
SIGMOIDNEW undefined). With the SSE code in gnubg now fixed, the sigmoid
implementation is the same everywhere.
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