-/// move_from_uci() takes a position and a string as input, and attempts to
-/// convert the string to a move, using simple coordinate notation (g1f3,
-/// a7a8q, etc.). This function is not robust, and expects that the input
-/// move is legal and correctly formatted.
-
-Move move_from_uci(const Position& pos, const std::string& str) {
-
- Square from, to;
- Piece piece;
- Color us = pos.side_to_move();
-
- if (str.length() < 4)
- return MOVE_NONE;
-
- // Read the from and to squares
- from = make_square(file_from_char(str[0]), rank_from_char(str[1]));
- to = make_square(file_from_char(str[2]), rank_from_char(str[3]));
-
- // Find the moving piece
- piece = pos.piece_on(from);
-
- // If the string has more than 4 characters, try to interpret the 5th
- // character as a promotion.
- if (str.length() > 4 && piece == piece_of_color_and_type(us, PAWN))
- {
- switch (tolower(str[4])) {
- case 'n':
- return make_promotion_move(from, to, KNIGHT);
- case 'b':
- return make_promotion_move(from, to, BISHOP);
- case 'r':
- return make_promotion_move(from, to, ROOK);
- case 'q':
- return make_promotion_move(from, to, QUEEN);
- }
- }