public Board UnmakeMove(Move move)
{
int row = (int)move.Row;
int column = (int)move.Column;
if (_BoardValues[column, row] == Values.None)
throw new ArgumentException();
_BoardValues[column, row] = Values.None;
int bit = ~((int)move.Value);
_RowValues[row] = (Values) ((int)_RowValues[row] & bit);
_ColumnValues[column] = (Values)((int)_ColumnValues[column] & bit);
_RegionValues[column / 3, row / 3] = (Values) ((int) _RegionValues[column / 3, row / 3] & bit);
_EmptySquaresCount++;
return this;
}
public Board MakeMove(Move move)
{
int row = (int)move.Row;
int column = (int)move.Column;
_BoardValues[column, row] = move.Value;
//int bit = (int) move.Value;
if ((_RowValues[row] & move.Value) == move.Value)
throw new ArgumentException(
string.Format("Invalid move {2}.\nNumber {0}. \nAlready present in row {1}\n{3}",
move.Value,
move.Row,
move.ToString(),
this.ToString()
));
if ((_ColumnValues[column] & move.Value) == move.Value)
throw new ArgumentException(
string.Format("Invalid move {2}.\nNumber {0} already present in column {1}\n{3}",
move.Value,
move.Column,
move.ToString(),
this.ToString()
));
if ((_RegionValues[column / 3, row / 3] & move.Value) == move.Value)
throw new ArgumentException(
string.Format("Invalid move {1}.\nNumber {0} already present in this region\n{2}",
move.Value,
move.ToString(),
this.ToString()
));
_RowValues[row] |= move.Value;
_ColumnValues[column] |= move.Value;
_RegionValues[column / 3, row / 3] |= move.Value;
_EmptySquaresCount--;
return this;
}