Pick a Pair of Packets
Using 4 of each color
Solution


Going from separate to alternating:

        PPPPBBBB..
        P..PBBBBPP
        PBBP..BBPP
        PBBPBPB..P
        ..BPBPBPBP
      

Back to Pick A Pair of Packets.


To get from the pattern of N P's followed by N B's to the pattern of N pairs of B's and P's takes N steps, but to reach the pattern of N pairs of P's followed by B's takes N+1 steps!


Last revised on 08 June 2008.