/*
* the depth is related with the number of empty position(hopping) or empty neighbor(move).
* the more the empty is, the more the possible children of each node, so the less the appropriate depth
*/
public static int determinApproporiateDepth(MorrisBoard bd) {
int depth = SEARCH_DEP_LIMIT_DEFAULT;
int numWhite = bd.countWhite();
if (numWhite < 3) {
depth = UNVALIED;
} else if (numWhite == 3) {
depth = 3;
} else {
int numEmpty = bd.countEmpty();
if ((numEmpty >= HIGH_BOTTOM) && (numEmpty <= HIGH_TOP)) {
depth = depthForHigh(numEmpty);
} else if ((numEmpty >= MED_BOTTOM) && (numEmpty <= MED_TOP)) {
depth = depthForMed(numEmpty);
} else if ((numEmpty >= LOW_BOTTOM) && (numEmpty <= LOW_TOP)) {
depth = depthForLow(numEmpty);
}
}
return depth;
}
