@Override
public short bestPlayMove() {
double mostWins = 1;
short result = PASS;
final ShortSet vacantPoints = board.getVacantPoints();
final SearchNode root = getRoot();
do {
mostWins = root.getWins(PASS);
// If the move chosen on the previous pass through this loop was
// illegal (e.g., because it was never actually tried in a playout),
// throw it out
if (result != PASS) {
log("Rejected " + board.getCoordinateSystem().toString(result) + " as illegal");
root.exclude(result);
result = PASS;
}
for (int i = 0; i < vacantPoints.size(); i++) {
final short move = vacantPoints.get(i);
if (root.getWins(move) > mostWins) {
mostWins = root.getWins(move);
result = move;
}
}
} while (result != PASS && !board.isLegal(result));
// Consider resigning
if (root.getWinRate(result) < RESIGN_PARAMETER) {
return RESIGN;
}
log(
"Selected "
+ board.getCoordinateSystem().toString(result)
+ " with "
+ root.getWins(result)
+ " wins in "
+ root.getRuns(result)
+ " runs");
return result;
}
