1) Fairy chess piece 
A hippogonal chess move is one similar to a knight`s move. That is, a leap m squares in one of the orthogonal directions, and n squares in the other, for integer values of m and n. It need not be a 2:1 ratio for m and n. A specific type of hippogonal move can be written (m,n), usually with the smaller number first. For example, the knight itself ....