Re: [gnugo-devel] cosmic patch

[bump]

> > The regressions are deterministic. However if there are two
> 
> Or they used to be. I can reproduce what Nicolet described by running:
> gq -l games/nngs/Lazarus-gnugo-3.1.31-200204140254.sgf -L 90 -r 6 -t -w
> 
> If I change the "6" to "5", GNU Go gets a different status for the P10
> group.
> I have tracked this down to a side effect of different hash collisions
> with the killer move heuristic by Evan. (Eventually, find_defense()
> returns a different move to owl.)

I don't see how this is relevant. Of course changing the random seed
can give different answers and this is as it should be.

But the function gtp_reg_genmove explicitly sets the random seed to 0.
So both regression runs were done with the same random seed 0.

But I tend to think that Stephane's observation that this test
result depends on the random seed makes the spurious change seem
less significant even if the exact mechanism is unclear.

Dan