public override List <Position> GetMoves(PieceMoveRequest pieceMoveRequest)
{
var moveList = new List <Position>();
foreach (var delta in Constants.RookDeltas)
{
var position = Position.Clone(Position) + delta;
while (position.IsValid())
{
if (pieceMoveRequest.Pieces.ContainsKey(position) &&
pieceMoveRequest.Pieces[position].Colour == Colour)
{
break;
}
moveList.Add(position);
if (pieceMoveRequest.Pieces.ContainsKey(position))
{
break;
}
position += delta;
}
}
return(moveList);
}
public override List <Position> GetMoves(PieceMoveRequest pieceMoveRequest)
{
var moveList = new List <Position>();
foreach (var delta in Constants.KnightDeltas)
{
var position = Position.Clone(Position) + delta;
if (pieceMoveRequest.Pieces.ContainsKey(position) && pieceMoveRequest.Pieces[position].Colour == Colour)
{
continue;
}
if (position.IsValid())
{
moveList.Add(position);
}
}
return(moveList);
}
public override List <Position> GetMoves(PieceMoveRequest pieceMoveRequest)
{
if (!(pieceMoveRequest is PawnMoveRequest pawnMoveRequest))
{
throw new ArgumentException("Expected pawn move request.");
}
var moveList = new List <Position>();
var pawnDelta = Colour == Colour.White ? Constants.WhitePawnDelta : Constants.BlackPawnDelta;
var position = Position + pawnDelta;
if (!pawnMoveRequest.Pieces.ContainsKey(position))
{
moveList.Add(position);
position += pawnDelta;
if (NumberMoves == 0 && !pawnMoveRequest.Pieces.ContainsKey(position))
{
moveList.Add(position);
}
}
var attackDeltaLeft = Position + (Colour == Colour.White ? new Position(1, -1) : new Position(-1, -1));
var attackDeltaRight = Position + (Colour == Colour.White ? new Position(1, 1) : new Position(-1, 1));
var attackList = new List <Position> {
attackDeltaRight, attackDeltaLeft
};
foreach (var attackPosition in attackList)
{
var enPassantDelta = Colour == Colour.White
? new Position(attackPosition.Row - 1, attackPosition.Column)
: new Position(attackPosition.Row + 1, attackPosition.Column);
if (pawnMoveRequest.Pieces.ContainsKey(attackPosition) &&
pawnMoveRequest.Pieces[attackPosition].Colour != Colour ||
CanEnPassant(pawnMoveRequest, enPassantDelta))
{
moveList.Add(attackPosition);
}
}
return(moveList);
}
public override List <Position> GetMoves(PieceMoveRequest pieceMoveRequest)
{
var moveList = new List <Position>();
foreach (var delta in Constants.KingDeltas)
{
var position = Position.Clone(Position) + delta;
if (position.IsValid() &&
!(pieceMoveRequest.Pieces.ContainsKey(position) && pieceMoveRequest.Pieces[position].Colour == Colour))
{
moveList.Add(position);
}
}
if (CanCastle(pieceMoveRequest.Pieces, out var castleDirection))
{
switch (castleDirection)
{
case CastleDirection.None:
break;
case CastleDirection.Left:
moveList.AddRange(GetLeftCastleSquares());
break;
case CastleDirection.Right:
moveList.AddRange(GetRightCastleSquares());
break;
case CastleDirection.Both:
moveList.AddRange(GetLeftCastleSquares());
moveList.AddRange(GetRightCastleSquares());
break;
default:
throw new ArgumentOutOfRangeException();
}
}
return(moveList);
}
public abstract List <Position> GetMoves(PieceMoveRequest pieceMoveRequest);
