Epicycle

A 2-player pure abstract strategy game using a single stash of Looney pyramids. Each player has 3 pyramids in hand, and 9 pyramids are arranged lying in a circle with a gap for a 10th pyramid.

On your turn, place one of your pyramids into the gap and remove a pyramid of a different size, n spaces clockwise or counterclockwise from the gap, where n is the pip-count of your placed pyramid.

If you have no legal move, you lose. If all 3 of your pieces in hand are the same size, you lose.