  We re-derive Manolescu's unoriented skein exact triangle for knot Floer
homology over F_2 combinatorially using grid diagrams, and extend it to the
case with Z coefficients by sign refinements. Iteration of the triangle gives a
cube of resolutions that converges to the knot Floer homology of an oriented
link. Finally, we re-establish the homological sigma-thinness of
quasi-alternating links.
