On Wed, 2008-12-10 at 12:03 -0800, terry mcintyre wrote: > > From: Don Dailey <[EMAIL PROTECTED]> > > > > On Wed, 2008-12-10 at 18:56 +0000, tony tang wrote: > > Some of my programs do not place any stone on the edge, unless it > > touches some other stone. I also count the diagonal, so if there is a > > stone diagonally next to an edge point, I allow a move to that point. > > But if there is nothing diagonally or orthogonally adjacent, I do not > > allow a move to that point. > > Is that only for the opening? It would exclude many monkey-jump invasions, > which can be very valuable in the early end-game. > > Back to the original question - accounting for symmetry, there 55 distinct > opening moves on a 19x19 board.
But that number very rapidly increases after the first move as soon as
the symmetry is destroyed. That would be a big reduction for the root
node if the opening position is the only one we are searching.
- Don
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