Interlocked Parallelogram

This concept identifies two parallelogram (non rectangular) 2x2 boxes of real people, each of which does the call. This is commonly done in a 2x4:

\syhlines{g1n,b1n,g2s,b2s} \syhlines{g1e,b1e,g4e,b4e}
1 3 1 3 2 4 2 4 1 3 1 3 4 2 4 2
before Interlocked Parallelogram Bingo after


Another application is from a 3x4:

\sxvBBBs{.+.,g3n,b3s,g4n,b4s,.+.} \sxvBBBs{.+.,b2s,g3n,b1s,g4n,.+.}
+ + 3 1 3 1 4 2 4 2 + + + + 2 4 3 1 1 3 4 2 + +
before Interlocked Parallelogram Ripoff after


Note that Interlocked Boxes could be applied to the same setup, and would have a different meaning.