Six chess knights are placed on a 4x3 chessboard, three along the top row and three along the bottom, which are labeled as P, Q, R, X, Y, Z, as shown in the figure below.

Exchange the positions of P and X, Q and Y and, R and Z, in minimum possible number of moves.

(In reply to Tangled Web ... by ed bottemiller)

There is a somewhat erlated problem on site 3 x 4 Knight Swap.  Maybe that should have been referenced.

That did say 'white' knights, and they are what KS offered to me for image creation.  No "chess" was to be played, just exchange positions as described.

Posted by brianjn on 2010-04-06 11:09:13