Parlett's Movement Notation
In his book The Oxford History of Board Games David Parlett used a notation to describe fairy piece movements. The move is specified by an expression of the form m={expression}, where m stands for "move", and the expression is composed from the following elements:
- Distance (numbers, n)
- 1 – a distance of one (i.e. to adjacent square)
- 2 – a distance of two
- n – any distance in the given direction
- Direction (punctuation, X)
- * – orthogonally or diagonally (all eight possible directions)
- + – orthogonally (four possible directions)
- > – orthogonally forwards
- < – orthogonally backwards
- <> – orthogonally forwards and backwards
- = – orthogonally sideways (used here instead of Parlett's divide symbol.)
- >= – orthogonally forwards or sideways
- <= – orthogonally backwards or sideways
- X – diagonally (four possible directions)
- X> – diagonally forwards
- X< – diagonally backwards
- Grouping
- / – two orthogonal moves separated by a slash denote a hippogonal move (i.e. jumping like knights)
- & – repeated movement in the same direction, such as for hippogonal riders (i.e. the nightrider)
Read more about this topic: Fairy Chess Piece, Notations
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