When John Tromp and I were thinking about these things in 2007 we decided to switch to counting real liberties instead of pseudo-liberties. Someone (Rémi?) told us that in the end the performance difference wasn't very large, and we verified this.
Álvaro. On Wed, Apr 1, 2009 at 2:08 PM, Isaac Deutsch <i...@gmx.ch> wrote: > Hi > > I'm currently using the method described here to detect if a group is in > atari (1 real liberty): > > http://computer-go.org/pipermail/computer-go/2007-November/012350.html > > Thus I store the number of pseudo libs, the sum and the sum of squares for > each group. > > Now for heavy playouts, it would be useful if I could somehow modify this so > I can easily detect if a group can be put into atari (meaning it has exactly > 2 real liberties). > > My intuition tells me it should be possible by also storing the sum of > positions^3. However, I can't quite wrap my head around how to do the check. > Has anyone looked into this before, and found an answer? I like this approach > because it's so easy and fast. > > Regards, > Isaac > -- > Neu: GMX FreeDSL Komplettanschluss mit DSL 6.000 Flatrate + Telefonanschluss > für nur 17,95 Euro/mtl.!* http://dsl.gmx.de/?ac=OM.AD.PD003K11308T4569a > _______________________________________________ > computer-go mailing list > computer-go@computer-go.org > http://www.computer-go.org/mailman/listinfo/computer-go/ > _______________________________________________ computer-go mailing list computer-go@computer-go.org http://www.computer-go.org/mailman/listinfo/computer-go/
