protected override List <BoardIndex> GetMovesInternal(Checker checker, BoardIndex begin, List <BoardIndex> moves)
{
Stack <Checker> checkersThatCanBeat = new Stack <Checker>();
for (int i = 0; i < board.Rows; i++)
{
for (int j = 0; j < board.Cols; j++)
{
Checker toTest = board[i, j];
if (toTest == null || toTest.PlayerType != checker.PlayerType)
{
continue;
}
var otherMoves = beatHandler.GetMoves(new BoardIndex(i, j));
if (otherMoves.Count > 0)
{
checkersThatCanBeat.Push(toTest);
}
}
}
if (checkersThatCanBeat.Count == 0 || checkersThatCanBeat.Contains(checker))
{
return(Next?.GetMoves(begin, moves) ?? new List <BoardIndex>());
}
return(new List <BoardIndex>());
}
protected override List <BoardIndex> GetMovesInternal(Checker checker, BoardIndex begin, List <BoardIndex> moves)
{
if (moves.Count <= 1)
{
return(Next?.GetMoves(begin, moves) ?? new List <BoardIndex>());
}
if (moves.Count > 1 && HasOpponentInBetween(checker.PlayerType, moves[moves.Count - 2], moves[moves.Count - 1]))
{
var beatMoves = beatHandler.GetMoves(begin, moves);
if (beatMoves.Count == 0)
{
return(new List <BoardIndex>());
}
else
{
var from = moves[moves.Count - 2];
var to = moves[moves.Count - 1];
int diffX = to.Row - from.Row;
int diffY = to.Col - from.Col;
int dx = Math.Sign(diffX);
int dy = Math.Sign(diffY);
int x = from.Row;
int y = from.Col;
while (x != to.Row && y != to.Col)
{
BoardIndex index = new BoardIndex(x, y);
beatMoves.Remove(index);
x += dx;
y += dy;
}
return(beatMoves);
}
}
return(new List <BoardIndex>());
}