// Min part of Minimax with AB pruning
private int MiniABPruning(PositionManager board, int depth, int a, int b)
{
if (depth <= 0)
{
return(board.GetValueOfBoard());
}
int min = int.MaxValue;
List <(int, int)> allPM = MoveManager.GetAllPossibleMoves(board, false, false);
if (allPM.Count == 0)
{
return(board.GetValueOfBoard());
}
foreach ((int, int)iMove in allPM)
{
PositionManager childBoard = new PositionManager(board);
childBoard.MovePiece(iMove.Item1, iMove.Item2);
min = Math.Min(min, MaxABPruning(childBoard, depth - 1, a, b));
b = Math.Min(b, min);
if (b <= a)
{
break;
}
}
return(min);
}
