John wrote:
which confirm yours. we also found a general formula n^2 -
floor((n^2+4n-16)/5)
The formula can also be written floor(4n(n-1)/5+4) for a slightly more
compact expression.
here's a nice symmetric 19x19 position with 277 strings:
X O . O . O X O . O . O X O . O . O X
. X O X O
GPW(Game Programming Workshop) was held 10th-12th November 2006 in
Hakone, Japan. And Youhei Yano reported the maximum number of strings
in 19x19 is 277.
19 O . O X O . O X O . O X O . O X O . O
18 X O X . X O X . X O X . X O X . X O X
17 . X O X O . O X . X O X O . O X O X .
16 X O . O X . X O
