http://www.jsoftware.com/jwiki/Essays/N%20Queens%20Problem is an immutable page.
It currently says: ((|change in y) ÷ (|change in x)) ∊ 1 ¯1 But the ratio of two absolute values can not be ¯1. I think it should read: ((change in y) ÷ (change in x)) ∊ 1 ¯1 FYI, -- Raul ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
