private void AppendRayMoves(
BoardSquare originSquare,
Position.Position position,
MoveDelta rayDelta,
List <Move> moves)
{
var board = position.Board;
var moveBuilder = new MoveBuilder(piece, originSquare);
var currentSquare = originSquare;
while (rayDelta.IsCanApplyTo(currentSquare))
{
currentSquare = rayDelta.GetDestSquare(currentSquare);
if (board.IsEmpty(currentSquare))
{
moves.Add(moveBuilder.SetDestSquare(currentSquare).Build());
}
else
{
var obstacle = board.GetPieceAt(currentSquare);
if (obstacle.player != position.PlayerToMove)
{
moves.Add(moveBuilder
.SetDestSquare(currentSquare)
.SetCapture(obstacle.piece)
.Build());
}
break;
}
}
}
public void AppendMoves(BoardSquare originSquare, Position.Position position, List <Move> moves)
{
var board = position.Board;
var playerToMove = position.PlayerToMove;
var moveDeltas = GetMoveDeltas();
var moveBuilder = new MoveBuilder(GetPiece(), originSquare);
for (int i = 0; i < moveDeltas.Length; ++i)
{
if (!moveDeltas[i].IsCanApplyTo(originSquare))
{
continue;
}
var destSquare = moveDeltas[i].GetDestSquare(originSquare);
if (board.IsEmpty(destSquare))
{
moves.Add(moveBuilder.SetDestSquare(destSquare).Build());
}
else
{
var pieceAtDestSquare = board.GetPieceAt(destSquare);
if (pieceAtDestSquare.player != playerToMove)
{
moves.Add(moveBuilder
.SetDestSquare(destSquare)
.SetCapture(pieceAtDestSquare.piece)
.Build());
}
}
}
}
public void AppendMoves(BoardSquare originSquare, Position.Position position, List <Move> moves)
{
var board = position.Board;
var moveBuilder = new MoveBuilder(Piece.Pawn, originSquare);
var moveAppender = GetMoveAppender(originSquare);
var moveForwardSquare = new BoardSquare(originSquare.Row + deltaRow, originSquare.Column);
if (board.IsEmpty(moveForwardSquare))
{
moveAppender(moveBuilder.SetDestSquare(moveForwardSquare), moves);
if (originSquare.Row == initialRow)
{
var moveDoubleForwardSquare = GetDoubleForwardMoveSquare(originSquare);
if (board.IsEmpty(moveDoubleForwardSquare))
{
moves.Add(moveBuilder
.SetDestSquare(moveDoubleForwardSquare)
.SetPawnDoubleMove()
.Build());
}
}
}
if (originSquare.Column > 0)
{
AppendIfCanCapture(
new BoardSquare(originSquare.Row + deltaRow, originSquare.Column - 1),
moveBuilder,
board,
moves,
moveAppender);
}
if (originSquare.Column + 1 < Board.Board.ColumnCount)
{
AppendIfCanCapture(
new BoardSquare(originSquare.Row + deltaRow, originSquare.Column + 1),
moveBuilder,
board,
moves,
moveAppender);
}
if (originSquare.Row == enPassantCaptureRow &&
position.EnPassantCaptureColumn.Exists(x => Abs(originSquare.Column - x) == 1))
{
var enPassantDstSquare = new BoardSquare(
originSquare.Row + deltaRow,
position.EnPassantCaptureColumn.ValueOr(0));
moves.Add(moveBuilder
.SetDestSquare(enPassantDstSquare)
.SetEnPassantCapture()
.Build());
}
}
private void AppendIfCanCapture(
BoardSquare destSquare,
MoveBuilder moveBuilder,
Board.Board board,
List <Move> moves,
Action <MoveBuilder, List <Move> > moveAppender)
{
if (board.IsEmpty(destSquare))
{
return;
}
var pieceAtDestSquare = board.GetPieceAt(destSquare);
if (pieceAtDestSquare.player != player)
{
moveAppender(
moveBuilder.SetDestSquare(destSquare).SetCapture(pieceAtDestSquare.piece),
moves);
}
}