/// <summary>get only LEGAL Operations by testing with domove</summary>
public override int GenerateMoves(Board board, int[] moves, int index)
{
int lastIndex = base.GenerateMoves(board, moves, index);
int j = index;
for (int i = 0; i < lastIndex; i++)
{
if (board.DoMove(moves[i], false))
{
moves[j++] = moves[i];
board.UndoMove();
}
}
return j;
}
/// <summary>
/// Given a boards creates a move from a String in uci format or short
/// algebraic form
/// </summary>
/// <param name="board"></param>
/// <param name="move"></param>
public static int GetFromString(Board board, string move, bool checkLegality)
{
int fromIndex = 0;
int toIndex = 0;
int moveType = 0;
int pieceMoved = 0;
// Ignore checks, captures indicators...
move = move.Replace("+", string.Empty).Replace("x", string.Empty).Replace("-", string.Empty
).Replace("=", string.Empty).Replace("#", string.Empty).ReplaceAll(" ", string.Empty
).ReplaceAll("0", "o").ReplaceAll("O", "o");
if ("ooo".Equals(move))
{
if (board.GetTurn())
{
move = "e1c1";
}
else
{
move = "e8c8";
}
}
else
{
if ("oo".Equals(move))
{
if (board.GetTurn())
{
move = "e1g1";
}
else
{
move = "e8g8";
}
}
}
char promo = move[move.Length - 1];
switch (System.Char.ToLower(promo))
{
case 'q':
{
moveType = TYPE_PROMOTION_QUEEN;
break;
}
case 'n':
{
moveType = TYPE_PROMOTION_KNIGHT;
break;
}
case 'b':
{
moveType = TYPE_PROMOTION_BISHOP;
break;
}
case 'r':
{
moveType = TYPE_PROMOTION_ROOK;
break;
}
}
// If promotion, remove the last char
if (moveType != 0)
{
move = Sharpen.Runtime.Substring(move, 0, move.Length - 1);
}
// To is always the last 2 characters
toIndex = BitboardUtils.Algebraic2Index(Sharpen.Runtime.Substring(move, move.Length
- 2, move.Length));
long to = unchecked((long)(0x1L)) << toIndex;
long from = 0;
BitboardAttacks bbAttacks = BitboardAttacks.GetInstance();
switch (move[0])
{
case 'N':
{
// Fills from with a mask of possible from values
from = board.knights & board.GetMines() & bbAttacks.knight[toIndex];
break;
}
case 'K':
{
from = board.kings & board.GetMines() & bbAttacks.king[toIndex];
break;
}
case 'R':
{
from = board.rooks & board.GetMines() & bbAttacks.GetRookAttacks(toIndex, board.GetAll
());
break;
}
case 'B':
{
from = board.bishops & board.GetMines() & bbAttacks.GetBishopAttacks(toIndex, board
.GetAll());
break;
}
case 'Q':
{
from = board.queens & board.GetMines() & (bbAttacks.GetRookAttacks(toIndex, board
.GetAll()) | bbAttacks.GetBishopAttacks(toIndex, board.GetAll()));
break;
}
}
if (from != 0)
{
// remove the piece char
move = Sharpen.Runtime.Substring(move, 1);
}
else
{
// Pawn moves
if (move.Length == 2)
{
if (board.GetTurn())
{
from = board.pawns & board.GetMines() & (((long)(((ulong)to) >> 8)) | ((((long)((
(ulong)to) >> 8)) & board.GetAll()) == 0 ? ((long)(((ulong)to) >> 16)) : 0));
}
else
{
from = board.pawns & board.GetMines() & ((to << 8) | (((to << 8) & board.GetAll()
) == 0 ? (to << 16) : 0));
}
}
if (move.Length == 3)
{
// Pawn capture
from = board.pawns & board.GetMines() & (board.GetTurn() ? bbAttacks.pawnDownwards
[toIndex] : bbAttacks.pawnUpwards[toIndex]);
}
}
if (move.Length == 3)
{
// now disambiaguate
char disambiguate = move[0];
int i = "abcdefgh".IndexOf(disambiguate);
if (i >= 0)
{
from &= BitboardUtils.COLUMN[i];
}
int j = "12345678".IndexOf(disambiguate);
if (j >= 0)
{
from &= BitboardUtils.RANK[j];
}
}
// if (BitboardUtils.popCount(from) > 1) {
// logger.error("Move NOT disambiaguated:\n"+board.toString() + "\n" +
// in);
// System.exit(-1);
// return -1;
// }
if (move.Length == 4)
{
// was algebraic complete e2e4 (=UCI!)
from = BitboardUtils.Algebraic2Square(Sharpen.Runtime.Substring(move, 0, 2));
}
if (from == 0)
{
return -1;
}
// Treats multiple froms, choosing the first Legal Move
while (from != 0)
{
long myFrom = BitboardUtils.Lsb(from);
from ^= myFrom;
fromIndex = BitboardUtils.Square2Index(myFrom);
bool capture = false;
if ((myFrom & board.pawns) != 0)
{
pieceMoved = PAWN;
// for passant captures
if ((toIndex != (fromIndex - 8)) && (toIndex != (fromIndex + 8)) && (toIndex != (
fromIndex - 16)) && (toIndex != (fromIndex + 16)))
{
if ((to & board.GetAll()) == 0)
{
moveType = TYPE_PASSANT;
capture = true;
}
}
// later is changed if it was not a pawn
// Default promotion to queen if not specified
if ((to & (BitboardUtils.b_u | BitboardUtils.b_d)) != 0 && (moveType < TYPE_PROMOTION_QUEEN
))
{
moveType = TYPE_PROMOTION_QUEEN;
}
}
if ((myFrom & board.bishops) != 0)
{
pieceMoved = BISHOP;
}
else
{
if ((myFrom & board.knights) != 0)
{
pieceMoved = KNIGHT;
}
else
{
if ((myFrom & board.rooks) != 0)
{
pieceMoved = ROOK;
}
else
{
if ((myFrom & board.queens) != 0)
{
pieceMoved = QUEEN;
}
else
{
if ((myFrom & board.kings) != 0)
{
pieceMoved = KING;
// Only if origin square is king's initial square TODO FRC
if (fromIndex == 3 || fromIndex == 3 + (8 * 7))
{
if (toIndex == (fromIndex + 2))
{
moveType = TYPE_QUEENSIDE_CASTLING;
}
if (toIndex == (fromIndex - 2))
{
moveType = TYPE_KINGSIDE_CASTLING;
}
}
}
}
}
}
}
// Now set captured piece flag
if ((to & (board.whites | board.blacks)) != 0)
{
capture = true;
}
int moveInt = Move.GenMove(fromIndex, toIndex, pieceMoved, capture, moveType);
if (checkLegality && board.DoMove(moveInt, false))
{
board.UndoMove();
return moveInt;
}
else
{
return moveInt;
}
}
return -1;
}