Betza's funny notation ones. The notation is based on dividing moves that can be made on a board of squares into groups of symmetry-equivalent moves, the moves within a group differing only in the direction in which the step is taken. Each such group (referred to as "atom") is indicated by a capital, such as N for the 8 moves of the knight. The letter that represents the atom is usually the first letter of the simplest piece from current or historic chess variants that has this move, such as A and F for the alfil and ferz of shatranj (ancient Arabic/Persian chess).
Wazir (chess) and wazir against the bare king are fortress draws. Wazir (chess) A wazir (or vizir) is a fairy chess piece that moves like a rook, but can go only one square. In notation, it is given the symbol W. In this article, the wazir is represented by an inverted rook. The wazir is a very old piece, appearing in some very early chess variants, such as Tamerlane chess. The general in xiangqi moves like a wazir, but has additional restrictions involving check and where it can move. It also appears in some historical large shogi variants, such as dai shogi,