Chess on a really big board is a large chess variant invented by Ralph Betza in 1996. The rules are the same as in regular chess except for these changes: Instead of a basic chessboard, in this the board is 16 16 squares. Therefore, starting position is changed. Added 8 fairy pieces and 8 extra pawns for each player. Extended pawn movement: an unmoved pawn can move one step, up to the middle of the board (in the case of the 16 16 board, the eighth rank), or anything in between. Once it has moved for the first time, it can only make one step at a time. En passant can be done on any of the squares pawn has passed through. In castling, the rook moves the same distance as it does in chess. Thus, the king moves further (to the space right behind the rook) The 50-move rule becomes a 100-move rule.

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