a problem in which black must make the geometrically longest moves available to him, as measured from square-centre to square-centre. If two or more longest moves of equal length are available, black may choose between them. This stipulation is most often attached to selfmates.
Found on
http://en.wikipedia.org/wiki/Chess_problem_terminology
(from the article `chess`) ...In a retractor problem the player given the task begins by taking back a move and replacing it with another move, with the aim of achieving the ...
Found on
http://www.britannica.com/eb/a-z/m/53
No exact match found.
