public static bool rules(Point piece, Point destination, GameState gs, MinimaxBoardLogic logic)
{
int xDistance = Math.Abs(piece.X - destination.X);
int yDistance = Math.Abs(piece.Y - destination.Y);
if (gs.state[piece].firstMove == true)
{
Point tempKingPoint = new Point('e', piece.Y);
if (destination.X == tempKingPoint.X && destination.Y == tempKingPoint.Y)
{
Piece tempKingPiece = gs.state[tempKingPoint];
if (tempKingPiece.type == PieceType.King && tempKingPiece.colour == gs.state[piece].colour &&
IterationCheck.isNoPieceBetweenLinear(piece, tempKingPoint, gs) && tempKingPiece.firstMove == true)
{
logic.castling = true;
return(true);
}
}
}
if (xDistance != 0 && yDistance != 0)
{
return(false);
}
else if (xDistance > 0 && yDistance > 0)
{
return(false);
}
else if (xDistance > 0 || yDistance > 0)
{
if (!IterationCheck.isNoPieceBetweenLinear(piece, destination, gs))
{
return(false);
}
}
return(true);
}
public static bool rules(Point piece, Point destination, bool from1to8, GameState gs, MinimaxBoardLogic logic, bool?computerPawnPromotion = false)
{
int xDistance = Math.Abs(piece.X - destination.X);
int yDistance = piece.Y - destination.Y;
bool pawnsFirstMove = gs.state[piece].firstMove;
if (from1to8)
{
if (yDistance != -1 && yDistance != -2)
{
return(false);
}
else if (yDistance == -2 && !pawnsFirstMove)
{
return(false);
}
else if (!IterationCheck.isNoPieceBetweenLinear(piece, destination, gs))
{
return(false);
}
}
else
{
if (yDistance != 1 && yDistance != 2)
{
return(false);
}
else if (yDistance == 2 && !pawnsFirstMove)
{
return(false);
}
else if (!IterationCheck.isNoPieceBetweenLinear(piece, destination, gs))
{
return(false);
}
}
if (xDistance != 0 && xDistance != 1)
{
return(false);
}
else if (xDistance == 0 && gs.state[destination].type != PieceType.Blank)
{
return(false);
}
else if (xDistance == 1 && gs.state[destination].type == PieceType.Blank &&
gs.state[new Point(destination.X, piece.Y)].type != PieceType.Pawn)
{
return(false);
}
else if (xDistance == 1 && gs.state[destination].type == PieceType.Blank &&
gs.state[new Point(destination.X, piece.Y)].type == PieceType.Pawn &&
gs.state[new Point(destination.X, piece.Y)].pawnDoubleSpace == false) // En passant
{
return(false);
}
if (Math.Abs(yDistance) == 2)
{
gs.state[piece].pawnDoubleSpace = true;
}
if (xDistance == 1 && gs.state[destination].type == PieceType.Blank &&
gs.state[new Point(destination.X, piece.Y)].type == PieceType.Pawn &&
gs.state[new Point(destination.X, piece.Y)].colour != gs.state[piece].colour &&
gs.state[new Point(destination.X, piece.Y)].pawnDoubleSpace == true)
{
logic.enPassant = true;
}
if (((from1to8 && (destination.Y == 8)) ||
(!from1to8 && (destination.Y == 1))))
{
char inputChar;
bool promotionCompleted = false;
while (!promotionCompleted)
{
if (!computerPawnPromotion.Value)
{
Console.WriteLine("Pawn promotion! Please select a new peice:");
inputChar = char.ToLower(Console.ReadKey().KeyChar);
}
else
{
inputChar = 'q';
}
switch (inputChar)
{
case 'q':
gs.state[piece].type = PieceType.Queen;
promotionCompleted = true;
break;
case 'r':
gs.state[piece].type = PieceType.Rook;
promotionCompleted = true;
break;
case 'n':
gs.state[piece].type = PieceType.Knight;
promotionCompleted = true;
break;
case 'b':
gs.state[piece].type = PieceType.Bishop;
promotionCompleted = true;
break;
default:
Console.WriteLine("Incorrect entry - please enter what new piece you would like (q, r, n, b)");
break;
}
}
}
return(true);
}
