Hi Magnus, I just recognized that it is not easy to handle sekis appropriate. You mentioned that case in your playouts, where it is neccessary to break a seki to win the game ? I wondered when I first saw a situation were a group in seki formed a dead shape and where sacrificing the group lead to a win for the player who sacrificed it. A nasty corner-case.. I will think about your solution! Thank you for sharing your experience!
- Lars > I struggled a lot with pass, because it somehow have to be legal when > it is necessary to pass. But in order to handle seki (that is play > strong in general when a seki is present or a possible outcome) I > found that the only way to do it is to let the playouts handle it > correctly. Since Valkyria has extremely heavy playouts it is not > costly. Basically one only has to check suicidal moves if they could > be part of a seki and then forbid such moves. But there are a lot of > special cases and one has to be careful to only forbid such moves that > really could be part of a seki. > > There is no single algorithm but just a lot of special cases for > different situations. > > -Magnus > > Quoting Lars Schäfers <[email protected]>: > > > So far, gomorra doesn't support the pass move in the search. So it > > is its only possibility to get through a seki position at the end of > > the game. Therefore gomorra passes 3 times before it resigns. > > Of course, its not optimal :) > > > > I wonder if there are others who haven't implemented the pass move > > but found a nice way of handling seki situations during the search? > > > > - Lars > > > >> -----Ursprüngliche Nachricht----- > >> Von: "Magnus Persson" <[email protected]> > >> Gesendet: 12.01.10 11:49:28 > >> An: [email protected] > >> Betreff: Re: [computer-go] Congratulations to Fuego! > > > > > >> If the winning chance are lower than a lower threshold it should > >> resign not pass. The only alternative to resigning in a lost position > >> is to play on unless there are no legal moves. > >> > >> Best Magnus > >> > >> Quoting Lars Schäfers <[email protected]>: > >> > >> > Hi Nick, > >> > > >> > just two little comments to the report: > >> > - In your comment to round 12 you stated that gomorra doesn't support > >> > cleanup. It does. But if the winning chance is lower than a certain > >> > threshold it also passes in the cleanup phase when there are still dead > >> > stones. > >> > - Since the last tournament there is a little typo in the "Processor > >> > numbers, power, etc" section, where gomorra got an additional m :) > >> > > >> > Thank you all for the tournament and thank you Nick for the report too!! > >> > > >> > Lars > >> > ___________________________________________________________ > >> > Preisknaller: WEB.DE DSL Flatrate für nur 16,99 Euro/mtl.! > >> > http://produkte.web.de/go/02/ > >> > > >> > _______________________________________________ > >> > computer-go mailing list > >> > [email protected] > >> > http://www.computer-go.org/mailman/listinfo/computer-go/ > >> > > >> > >> > >> > >> -- > >> Magnus Persson > >> Berlin, Germany > >> _______________________________________________ > >> computer-go mailing list > >> [email protected] > >> http://www.computer-go.org/mailman/listinfo/computer-go/ > >> > > > > > > ___________________________________________________________ > > Preisknaller: WEB.DE DSL Flatrate für nur 16,99 Euro/mtl.! > > http://produkte.web.de/go/02/ > > > > _______________________________________________ > > computer-go mailing list > > [email protected] > > http://www.computer-go.org/mailman/listinfo/computer-go/ > > > > > > -- > Magnus Persson > Berlin, Germany > _______________________________________________ > computer-go mailing list > [email protected] > http://www.computer-go.org/mailman/listinfo/computer-go/ > ______________________________________________________ GRATIS für alle WEB.DE-Nutzer: Die maxdome Movie-FLAT! Jetzt freischalten unter http://movieflat.web.de _______________________________________________ computer-go mailing list [email protected] http://www.computer-go.org/mailman/listinfo/computer-go/
