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other variants to explore discussed at the links,
including one that does not have to be flipped
over to tile the whole surface. Mathematicians
are reviewing the work, and there should be a lot
more written about it soon.
MORE TILING PUZZLES
Finally, although it is not strictly speaking a tiling,
you might want to play with a 2,000-year-old
tile puzzle attributed to our friend Archimedes,
the ostomachion (see en.wikipedia.org/wiki/
ostomachion). You can cut out its 14 pieces from
one of the versions online and explore the various
ways the triangles and quadrilaterals can be put
together. People have also created versions of it
on the ...