Portable Game Notation Algebraic Notation (SAN). For most moves the SAN consists of the letter abbreviation for the piece, an codice_27 if there is a capture, and the two-character algebraic name of the final square the piece moved to. The letter abbreviations are codice_28 (king), codice_29 (queen), codice_30 (rook), codice_31 (bishop), and codice_32 (knight). The pawn is given an empty abbreviation in SAN movetext, but in other contexts the abbreviation codice_33 is used. The algebraic name of any square is as per usual algebraic chess notation; from white's perspective, the leftmost square closest to white is codice_34, the rightmost square closest to the
Fairy chess piece here for "initial" in the description of the different types of pawns. The letter a is used here to describe again, indicating the piece can make the move on which it is prefixed multiple times, possibly with new modifiers mentioned behind the a, which then apply to the second 'leg' of the move. Directional specifications for such a continuation step should be interpreted relative to the first step (e.g. aW is a two-step orthogonal move that can change direction; afW is a two-step orthogonal move that must continue the same direction). To handle some frequently encountered special moves, e can