Fairy chess piece (1,0)-rider which cannot jump). The grasshopper moves along the same lines as a queen, hopping over another piece and landing on the square immediately beyond it. Compound pieces combine the powers of two or more pieces. The archbishop, chancellor, and amazon are three popular compound pieces, combining the powers of minor orthodox chess pieces. When one of the combined pieces is a knight, the compound may be called a "knighted" piece. The archbishop, chancellor, and amazon are the knighted bishop, knighted rook, and knighted queen respectively. When one of the combined pieces is a king, the compound may be called
Chess "!!" an excellent move, "?" a mistake, "??" a blunder, "!?" an interesting move that may not be best, or "?!" a dubious move not easily refuted. For example, one variation of a simple trap known as the Scholar's mate (see animated diagram) can be recorded: The text-based Portable Game Notation (PGN), which is understood by chess software, is based on short form English language algebraic notation. Until about 1980, the majority of English language chess publications used a form of descriptive notation. In descriptive notation, files are named according to the piece which occupies the back rank at the