A polyking is a figure formed by joining squares
edge to edge or diagonally corner to corner.
How few cells can one remove from an 8×8 checkerboard
to exclude a given polyking?
Here I show minimal known exclusions.
If you find a better one, please write.
Thanks to Jenard Cabilao for suggesting this idea.
I show exclusions only for polykings that are not also polyominoes.
Last revised 2013-04-12.
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Col. George Sicherman