- set_bit(&(byColorBB[us]), rto);
- set_bit(&(byTypeBB[ROOK]), rto);
- set_bit(&(byTypeBB[0]), rto); // HACK: byTypeBB[0] == occupied squares
-
- // Update board array:
- board[kfrom] = board[rfrom] = EMPTY;
- board[kto] = king_of_color(us);
- board[rto] = rook_of_color(us);
-
- // Update king square:
- kingSquare[us] = kto;
-
- // Update piece lists:
- pieceList[us][KING][index[kfrom]] = kto;
- pieceList[us][ROOK][index[rfrom]] = rto;
- int tmp = index[rfrom];
- index[kto] = index[kfrom];
- index[rto] = tmp;
-
- // Update incremental scores:
- mgValue -= mg_pst(us, KING, kfrom);
- mgValue += mg_pst(us, KING, kto);
- egValue -= eg_pst(us, KING, kfrom);
- egValue += eg_pst(us, KING, kto);
- mgValue -= mg_pst(us, ROOK, rfrom);
- mgValue += mg_pst(us, ROOK, rto);
- egValue -= eg_pst(us, ROOK, rfrom);
- egValue += eg_pst(us, ROOK, rto);
-
- // Update hash key:
- key ^= zobrist[us][KING][kfrom] ^ zobrist[us][KING][kto];
- key ^= zobrist[us][ROOK][rfrom] ^ zobrist[us][ROOK][rto];
-
- // Clear en passant square:
- if(epSquare != SQ_NONE) {
- key ^= zobEp[epSquare];
- epSquare = SQ_NONE;
- }
-
- // Update castling rights:
- key ^= zobCastle[castleRights];
- castleRights &= castleRightsMask[kfrom];
- key ^= zobCastle[castleRights];
-
- // Reset rule 50 counter:
- rule50 = 0;
-
- // Update checkers BB:
- checkersBB = attacks_to(king_square(them), us);
-}
-
-
-/// Position::do_promotion_move() is a private method used to make a promotion
-/// move. It is called from the main Position::do_move function. The
-/// UndoInfo object, which has been initialized in Position::do_move, is
-/// used to store the captured piece (if any).
-
-void Position::do_promotion_move(Move m, UndoInfo &u) {
- Color us, them;
- Square from, to;
- PieceType capture, promotion;