public Paths PathsFrom(BoardLocation location, int forPlayer)
{
var paths = new Paths();
var playerIdx = (Colours)forPlayer;
foreach (var dest in new[]
{
location.MoveForward(playerIdx),
location.MoveForward(playerIdx)?.MoveRight(playerIdx),
location.MoveRight(playerIdx),
location.MoveBack(playerIdx)?.MoveRight(playerIdx),
location.MoveBack(playerIdx),
location.MoveBack(playerIdx)?.MoveLeft(playerIdx),
location.MoveLeft(playerIdx),
location.MoveLeft(playerIdx)?.MoveForward(playerIdx)
})
{
if (dest != null)
{
paths.Add(new Path {
BoardMove.Create(location, dest, (int)ChessMoveTypes.KingMove)
});
}
}
return(paths);
}
public Paths PathsFrom(BoardLocation location, int forPlayer)
{
var playerIdx = (Colours)forPlayer;
Guard.ArgumentException(
() => location.Y == (forPlayer == 0 ? 8 : 1),
$"{ChessPieceName.Pawn} is invalid at {location}.");
var paths = new Paths();
var takeTypes = new List <int> {
(int)DefaultActions.TakeOnly
};
if (location.Y == Pieces.Pawn.EnPassantRankFor(playerIdx))
{
takeTypes.Add((int)ChessMoveTypes.TakeEnPassant);
}
for (int i = 0; i < 2; i++)
{
var takeLocation = i == 0
? location.MoveForward(playerIdx).MoveLeft(playerIdx)
: location.MoveForward(playerIdx).MoveRight(playerIdx);
if (takeLocation == null)
{
continue;
}
if (takeLocation.Y != ChessGame.EndRankFor(playerIdx))
{
foreach (var takeType in takeTypes)
{
var move = BoardMove.Create(location, takeLocation, takeType);
paths.Add(new Path {
move
});
}
}
else
{
foreach (var promotionPieces in new[] { ChessPieceName.Queen, ChessPieceName.Rook, ChessPieceName.Bishop, ChessPieceName.Knight })
{
var move = new BoardMove(location, takeLocation,
(int)DefaultActions.UpdatePieceWithTake, new ChessPieceEntityFactory.ChessPieceEntityFactoryTypeExtraData
{
Owner = playerIdx,
PieceName = promotionPieces
});
paths.Add(new Path {
move
});
}
}
}
return(paths);
}
public Paths PathsFrom(BoardLocation location, int forPlayer)
{
var paths = new Paths();
var playerIdx = (Colours)forPlayer;
var oneSquareForward = location.MoveForward(playerIdx);
if (oneSquareForward.Y != ChessGame.EndRankFor(playerIdx))
{
var move = new BoardMove(location, oneSquareForward, (int)DefaultActions.MoveOnly);
var path = new Path {
move
};
if (location.Y == Pieces.Pawn.StartRankFor(playerIdx))
{
BoardLocation to = location.MoveForward(playerIdx, 2);
path.Add(new BoardMove(location, to, (int)ChessMoveTypes.PawnTwoStep));
}
paths.Add(path);
}
else
{
foreach (var promotionPieces in new[] { ChessPieceName.Queen, ChessPieceName.Rook, ChessPieceName.Bishop, ChessPieceName.Knight })
{
var move = new BoardMove(location, oneSquareForward, (int)DefaultActions.UpdatePiece, new ChessPieceEntityFactory.ChessPieceEntityFactoryTypeExtraData
{
Owner = playerIdx,
PieceName = promotionPieces
});
paths.Add(new Path {
move
});
}
}
return(paths);
}
public static BoardLocation KnightVerticalMove(this BoardLocation location, Colours colour, bool forward, bool right) => location.MoveForward(colour, forward ? 2 : -2)?.MoveRight(colour, right ? 1 : -1);
