public void Make_BlackCastleRemovesRights()
{
var board = Create("r3k2r/8/8/8/8/8/8/R3K2R w KQkq -");
var boardReference = Create("r3k2r/8/8/8/8/8/8/R3K2R w KQkq -");
var move = MoveBuilder.CreateCastle(Colour.Black, MoveType.CastleKing);
board.MakeMove(move);
Assert.True(board.WhiteCanCastleKingSide);
Assert.True(board.WhiteCanCastleQueenSide);
Assert.False(board.BlackCanCastleKingSide);
Assert.False(board.BlackCanCastleQueenSide);
board.UnMakeMove(move);
TestHelpers.AssertEqual(board, boardReference);
}
private void AddCastles(MoveGenerationWorkspace workspace, Square kingSquare)
{
var relativeBitBoard = workspace.RelativeBitBoard;
if (!relativeBitBoard.CanCastleKingSide && !relativeBitBoard.CanCastleQueenSide)
{
return;
}
// We lose castle rights if any piece moves so they MUST be in correct locations
if (relativeBitBoard.CanCastleKingSide)
{
var kingSideRookIndex = relativeBitBoard.KingSideRookStartSquare.ToSquareIndex();
var kingToRook = AttackBitmaps.Paths[kingSquare.Index][kingSideRookIndex];
var squaresBetween = kingToRook & ~relativeBitBoard.KingStartSquare & ~relativeBitBoard.KingSideRookStartSquare;
if ((squaresBetween & relativeBitBoard.OccupiedSquares) == 0)
{
var stepSquares = relativeBitBoard.KingSideCastleStep1 | relativeBitBoard.KingSideCastleStep2;
var safeSquaresAsList = FindSafeSquares(workspace, stepSquares.ToList());
var safeSquares = (SquareFlag)0;
foreach (var safeSquare in safeSquaresAsList)
{
safeSquares |= safeSquare;
}
if (squaresBetween == safeSquares)
{
workspace.NonCaptureMoveBuffer.Add(MoveBuilder.CreateCastle(relativeBitBoard.Colour, MoveType.CastleKing));
}
}
}
if (relativeBitBoard.CanCastleQueenSide)
{
var queenSideRookIndex = relativeBitBoard.QueenSideRookStartSquare.ToSquareIndex();
var kingToRook = AttackBitmaps.Paths[kingSquare.Index][queenSideRookIndex];
var squaresBetween = kingToRook & ~relativeBitBoard.KingStartSquare & ~relativeBitBoard.QueenSideRookStartSquare;
if ((squaresBetween & relativeBitBoard.OccupiedSquares) == 0)
{
var stepSquares = relativeBitBoard.QueenSideCastleStep1 | relativeBitBoard.QueenSideCastleStep2;
var safeSquaresAsList = FindSafeSquares(workspace, stepSquares.ToList());
var safeSquares = (SquareFlag)0;
foreach (var safeSquare in safeSquaresAsList)
{
safeSquares |= safeSquare;
}
// On Queen side the King doesn't pass through B file so we don't look for Check there
var squaresBetweenMinusFirstRookStep = squaresBetween & ~relativeBitBoard.QueenSideRookStep1Square;
if (squaresBetweenMinusFirstRookStep == safeSquares)
{
workspace.NonCaptureMoveBuffer.Add(MoveBuilder.CreateCastle(relativeBitBoard.Colour, MoveType.CastleQueen));
}
}
}
}