// Takes ownership of all arrays passed to it; they should not be changed after the position is created.
public Position(Piece[] pieceSquares, Color sideToMove, ulong castlingRights, ulong enPassant, int fiftyMoveCounter, int fullMove)
{
_pieceBitboards = new BitboardArray();
_squares = new PieceSquareArray();
// safer to go by the length the PieceSquareArray, because the Piece[] will always error on index out of bounds
for (int i = 0; i < _squares.Length; i++)
{
_squares[i] = pieceSquares[i];
}
PopulatePieceBitboardsFromSquares(ref _pieceBitboards, pieceSquares);
_occupiedWhite = CalculateOccupied(Color.White);
_occupiedBlack = CalculateOccupied(Color.Black);
_occupied = _occupiedWhite | _occupiedBlack;
Parent = null;
SideToMove = sideToMove;
CastlingRights = castlingRights;
EnPassant = enPassant;
FiftyMoveCounter = fiftyMoveCounter;
GamePly = GamePlyFromFullMove(fullMove, sideToMove);
_historyPly = 0;
RepetitionNumber = 1;
ZobristHash = ZobristHashing.CalculateFullHash(this);
}
private void ZobristTestHelper(Position position, int depth)
{
Assert.AreEqual(position.ZobristHash, ZobristHashing.CalculateFullHash(position));
if (depth <= 0)
{
return;
}
var moves = new List <Move>();
_moveGenerator.Generate(moves, position);
foreach (var move in moves)
{
var updatedBoard = Position.MakeMove(new Position(), move, position);
if (!_moveGenerator.OnlyLegalMoves && updatedBoard.MovedIntoCheck())
{
continue;
}
ZobristTestHelper(updatedBoard, depth - 1);
}
}
