private void MakeNextMove()
{
Move bestMove = new Move()
{
Column = -1,
Row = -1
};
int bestScore = int.MinValue;
// check every valid move for this particular board, then select the one with the best 'score'
List <Move> moves = ValidMovesForBoard(_viewModel);
foreach (Move nextMove in moves)
{
// clone the current board and make this move
GameBoardViewModel testBoard = new GameBoardViewModel(_viewModel);
testBoard.MakeMove(nextMove.Row, nextMove.Column);
// determine the score for this move
int scoreForMove = ScoreForBoard(testBoard, 1);
// pick the best
if (scoreForMove > bestScore || bestScore == int.MinValue)
{
bestScore = scoreForMove;
bestMove.Row = nextMove.Row;
bestMove.Column = nextMove.Column;
}
}
if (bestMove.Column != -1 && bestMove.Row != -1)
{
_viewModel.MakeMove(bestMove.Row, bestMove.Column);
}
}
private void MakeNextMove()
{
Move bestMove = new Move()
{
Column = -1,
Row = -1
};
int bestScore = int.MinValue;
// check every valid move for this particular board, then select the one with the best 'score'
List<Move> moves = ValidMovesForBoard(_viewModel);
foreach (Move nextMove in moves)
{
// clone the current board and make this move
GameBoardViewModel testBoard = new GameBoardViewModel(_viewModel);
testBoard.MakeMove(nextMove.Row, nextMove.Column);
// determine the score for this move
int scoreForMove = ScoreForBoard(testBoard, 1);
// pick the best
if (scoreForMove > bestScore || bestScore == int.MinValue)
{
bestScore = scoreForMove;
bestMove.Row = nextMove.Row;
bestMove.Column = nextMove.Column;
}
}
if (bestMove.Column != -1 && bestMove.Row != -1)
{
_viewModel.MakeMove(bestMove.Row, bestMove.Column);
}
}
// Computes the score for the given board
private int ScoreForBoard(GameBoardViewModel board, int depth)
{
// if we have reached the maximum search depth, then just compute the score of the current
// board state
if (depth >= _maxDepth)
{
return(_computerColor == BoardSquareState.WHITE ?
board.WhiteScore - board.BlackScore :
board.BlackScore - board.WhiteScore);
}
int minMax = int.MinValue;
// check every valid next move for this particular board
List <Move> moves = ValidMovesForBoard(board);
foreach (Move nextMove in moves)
{
// clone the current board and make the move
GameBoardViewModel testBoard = new GameBoardViewModel(board);
testBoard.MakeMove(nextMove.Row, nextMove.Column);
// compute the score for this board
int score = ScoreForBoard(testBoard, depth + 1);
// pick the best score
if (depth % 2 == 0)
{
if (score > minMax || minMax == int.MinValue)
{
minMax = score;
}
}
else
{
if (score < minMax || minMax == int.MinValue)
{
minMax = score;
}
}
}
return(minMax);
}
// Computes the score for the given board
private int ScoreForBoard(GameBoardViewModel board, int depth)
{
// if we have reached the maximum search depth, then just compute the score of the current
// board state
if (depth >= _maxDepth)
{
return _computerColor == BoardSquareState.WHITE ?
board.WhiteScore - board.BlackScore :
board.BlackScore - board.WhiteScore;
}
int minMax = int.MinValue;
// check every valid next move for this particular board
List<Move> moves = ValidMovesForBoard(board);
foreach (Move nextMove in moves)
{
// clone the current board and make the move
GameBoardViewModel testBoard = new GameBoardViewModel(board);
testBoard.MakeMove(nextMove.Row, nextMove.Column);
// compute the score for this board
int score = ScoreForBoard(testBoard, depth + 1);
// pick the best score
if (depth % 2 == 0)
{
if (score > minMax || minMax == int.MinValue)
{
minMax = score;
}
}
else
{
if (score < minMax || minMax == int.MinValue)
{
minMax = score;
}
}
}
return minMax;
}
