A game for two in which you catch your moves: piece + file + rank, e.g. knight + f + 3.
A chess game for two players. Pieces, files a–h and ranks 1–8 rain down from above. Catch the three parts of your move, for example:
Pawn moves need no piece: d + 4 is enough. If two pieces can reach the same square, also catch the file or rank (e.g. knight + b + d + 2) or click the piece on the board. Only characters that fit a possible move appear. Castling: king to g1 or c1.
Fast moves, captures and checks bring points, invalid moves cost 5.