Lots-of 5x5 variations, trying to determine optimal play after black's first move.
And here, a picture of the game tree.
Optimal and not-quite-so-optimal 7x7 variations.
(From a series of articles in "Kido" entitled
"Iguchi Kaiseki no Kuro-Shiro Tateyoko" (Iguchi Kaiseki's Black-and-White
Crisscross). Most analysis by a Mr. Oshima, with some help from
Kudo Norio 9 dan. Communicated to me through James Davies and Bill Taylor.
Now updated from Davies' article in the American Go Journal.)
