[computer-go] COGS bug in Ko detection? =======================================
Sorry to jump into this thread -- I have only just joined the compgo mailing list since Nick Wedd told me that my work on Hanezeki had been mentioned here ... In reply to Terry McIntyre <terrymcint...@yahoo.com> > Robert, your reference to hane-seki, also called hanezeki, > was new to me, so I did a bit of googling. My head is now > spinning; I figure that any program which embodies the > knowledge in the following paper should be quite interesting: > http://www.goban.demon.co.uk/go/seki/hanezeki/hanezeki_abstract.pdf 0) That paper has got at least one omission of which I am aware -- it fails to analyse configurations including "bulky 7", which can/will lead to kos! 1) There is something similar (both players lose points if they capture first), but simpler: a seki in which 2 opposing groups can each capture a dead shape (nakade) of the same size, but do not want to. 2) There is also something similar, but more complicated -- I call it (Mutual, Immediate) Capture and Delayed Recapture (CDR). I discuss CDR briefly in a paper that gives an overview of Seki, and the research still to be done: This paper was given at the International Conference on Baduk, in October 2005, and was published in the Korean Journal of Baduk Studies: http://www.earticle.net/Search/Open/ArticleView.aspx?view=MgAxADcAOQAyAA== It is available via my web-site: http://www.goban.demon.co.uk/go/seki/overview/overview.html It is _possible_, though I believe extremely unlikely, that there exists a "one-sided" predecessor version of (Mutual, Immediate) Capture and Delayed Recapture, such that only one of the players can sensibly initiate play, and when they do it becomes a "normal" (Mutual, Immediate) Capture and Delayed Recapture! :-( I do not know if any of this affects your concerns about kos. Regards Harry ---------+---------+---------+---------+---------+---------+ ha...@goban.demon.co.uk 38 Henley St, Oxford, OX4 1ES, UK http://www.goban.demon.co.uk Tel: +44 1865 248775 Oxford Go Club: http://www.britgo.org/clubs/oxford_c.html _______________________________________________ computer-go mailing list computer-go@computer-go.org http://www.computer-go.org/mailman/listinfo/computer-go/
