private void setValue(Square square, int value) {
if (square.hasValue()) {
if (square.getValue() != value) {
throw new IllegalArgumentException(
"Illegal move!\n" + new Move(square.rowIdx, square.colIdx, value) + "\n" + this);
}
return;
}
if (square.row.contains(value) || square.col.contains(value) || square.group.contains(value)) {
throw new IllegalArgumentException(
"Illegal move!:\n" + new Move(square.rowIdx, square.colIdx, value) + "\n" + this);
}
square.setValue(value);
eliminateCandidateValue(square.row, value);
eliminateCandidateValue(square.col, value);
eliminateCandidateValue(square.group, value);
executeOnlyChoiceRule();
}
@Override
public void visit(Square square) {
if (!square.hasValue()) {
remainingSquares++;
}
}