What's the shortest path from A to R in the array below, if your moves are to be in the repeated length sequence 3, 2, 1, 3, 2, 1... (such as, say ADJMC...), and no two successive moves are in the same direction or in the reverse direction? Moves may be orthogonal or diagonal. No move may end on a hyphen (-) but may jump over them and the R must be reached on exact count.

ABCD-
EFGH-
--IJK
-LM-N
OP-QR

(In reply to Hoping or Hopping Hopefully by ed bottemiller)

The positions of the hyphens count in the length of the move. Their identification as hyphens merely prevents landing there; it does not mean that hyperspace allows warping through the occupied area.

Posted by Charlie on 2010-11-03 16:33:17