Rang (<=34) ? S (0 = .   1 = :   2 = /   3 = -   4 = x   5 = o   6 = +   7 = *)
N=33(dia2)    0 solutions found    21612668 positions in 42871117 cases checked
average number of stones on board 34

real166:31:15.4
user 21:02:37:0
sys      5:08.0