//====================================== Eyes =================================
char is_eyeish(Position *pos, Point pt)
// test if pt is inside a single-color diamond and return the diamond color or 0
// this could be an eye, but also a false one
{
Color eyecolor=EMPTY, other=EMPTY;
int k;
Point n;
FORALL_NEIGHBORS(pos, pt, k, n) {
Color c = point_color(pos,n);
if(c == OUT) continue; // ignore OUT of board neighbours
if(c == EMPTY) return 0;
if(eyecolor == EMPTY) {
eyecolor = c;
other = color_other(c);
}
else if (c == other) return 0;
}
int uct_simulate(UCTNode * self, Board * board, Color color) {
int result;
Pos move;
UCTNode * ptr;
if(!self->child && self->visits < UCT_MIN_VISITS)
result = uct_play_random_game(board, color);
else {
if(!self->child) create_children(self, board, color);
ptr = uct_select(self, board, color);
result = 1 - uct_simulate(ptr, board, color_other(color));
}
self->visits ++;
self->wins += 1 - result;
return result;
}
