Knight (chess) king); in descriptive chess notation, "Kt" is sometimes used instead, mainly in older literature. In chess problems and endgame studies, the letter "S", standing for the German name for the piece, "Springer", is often used (and in some variants of fairy chess "N" is used for the popular fairy chess piece, the nightrider). Even among sets of the standard Staunton pattern, the style of the pieces varies. The knights vary considerably. Here are some examples. The knight, along with the king and the rook, has the oldest defined movement of any chess piece, its movement being unchanged since the invention
Shogi notation A piece that promotes is indicated with 成 following the piece's character, such as ７三桂成 (N-73+). If a piece does not promote, this is indicated with 不成 following the piece's character, such as ７三桂不成 (N-73=). There is an alternate symbol for unpromotion: 生 is sometimes used instead of 不成. Unlike western notation, numbering Japanese game records is not obligatory. Although players' moves often aren't numbered, shogi moves are always counted per player's move. This is commonly seen in checkmate problems where a "3-move" ３手 checkmate problem would mean a move sequence of black-white-black. This is unlike western chess which counts