Re: [gnugo-devel] pattern questions

[alain Baeckeroot]

Le mardi 28 novembre 2006 20:49, Gunnar Farneb�ck a écrit :
> Alain wrote:
> > In regression test nngs:308 , gg3.7.10 wants M9 which is 1 point
> > gote. There are other much better moves (nearly 6 pts gote, 2 gote,
> > 1 sente)
> 
> Actually M9 is reverse sente but indeed there are better moves.
[...] 
> 
> Sente13 is a reverse sente pattern, which is perfectly appropriate.
> 
Maybe it should be renamed RevSente13 ?

> > Q3/ its not a question: the choice of the move is made during the
> > second pass of endgame stuff, so it is probably another problem to
> > fix.
> 
> Indeed. The endgame database adds this match:
> 
> pattern 'CF3'+0 matched at M9
> ...followup value 12.25
> 
> which incorrectly claims that the pattern is sente. Together with the
> reverse sente found by Sente13 this move is considered double sente
> and thus valued very high. Interestingly there's an old comment by me
> in endgame.db that CF3 is redundant. Try to just remove it and see
> what happens.
I just commented out CF3 pattern, and now the test PASS.

i ll put regression result and patch in a TRAC-ticket soon
Alain