private static void GenerateQuietMoves(this IPosition pos, MoveList moves, Emgf flags)
{
var currentSide = pos.State.SideToMove;
var up = currentSide == PlayerExtensions.White ? EDirection.North : EDirection.South;
var notOccupied = ~pos.Pieces();
var pushed = (pos.Pieces(EPieceType.Pawn, currentSide) & ~currentSide.Rank7()).Shift(up) & notOccupied;
pos.AddPawnMoves(moves, pushed, currentSide.PawnPushDistance(), EMoveType.Quiet, flags);
pushed &= currentSide.Rank3();
pos.AddPawnMoves(moves, pushed.Shift(up) & notOccupied, currentSide.PawnDoublePushDistance(), EMoveType.Doublepush, flags);
pos.AddMoves(moves, notOccupied, flags);
if (pos.InCheck)
{
return;
}
for (var castleType = ECastleling.Short; castleType < ECastleling.CastleNb; castleType++)
{
if (pos.CanCastle(castleType))
{
pos.AddCastleMove(moves, pos.GetKingCastleFrom(currentSide, castleType), castleType.GetKingCastleTo(currentSide), flags);
}
}
}
private void GenerateQuietMoves(MoveList moves)
{
var currentSide = _position.State.SideToMove;
var up = currentSide == PlayerExtensions.White ? EDirection.North : EDirection.South;
var notOccupied = ~_position.Pieces();
var pushed = (_position.Pieces(EPieceType.Pawn, currentSide) & ~currentSide.Rank7()).Shift(up) & notOccupied;
AddPawnMoves(moves, pushed, currentSide.PawnPushDistance(), EMoveType.Quiet);
pushed &= currentSide.Rank3();
AddPawnMoves(moves, pushed.Shift(up) & notOccupied, currentSide.PawnDoublePushDistance(), EMoveType.Doublepush);
AddMoves(moves, notOccupied);
if (_position.InCheck)
{
return;
}
for (var castleType = ECastleling.Short; castleType < ECastleling.CastleNb; castleType++)
{
if (_position.CanCastle(castleType))
{
AddCastleMove(moves, _position.GetKingCastleFrom(currentSide, castleType), castleType.GetKingCastleTo(currentSide));
}
}
}
private string ValidateCastleling(string error)
{
Span <Player> players = stackalloc Player[] { Player.White, Player.Black };
Span <CastlelingRights> crs = stackalloc CastlelingRights[] { CastlelingRights.None, CastlelingRights.None };
foreach (var c in players)
{
crs[0] = CastlelingRights.KingSide.MakeCastlelingRights(c);
crs[1] = CastlelingRights.QueenSide.MakeCastlelingRights(c);
var ourRook = PieceTypes.Rook.MakePiece(c);
foreach (var cr in crs)
{
if (!_pos.CanCastle(cr))
{
continue;
}
var rookSq = _pos.CastlingRookSquare(cr);
if (_board.PieceAt(rookSq) != ourRook)
{
error = AddError(error, $"rook does not appear on its position for {c}");
}
if (_pos.GetCastlelingRightsMask(rookSq) != cr)
{
error = AddError(error, $"castleling rights mask at {rookSq} does not match for player {c}");
}
if ((_pos.GetCastlelingRightsMask(_pos.GetKingSquare(c).AsInt()) & cr) != cr)
{
error = AddError(error, $"castleling rights mask at {_pos.GetKingSquare(c)} does not match for player {c}");
}
}
}
return(error);
}