Champagne glass (or 45P22.1) is a period 22 billiard table oscillator discovered by Dean Hickerson on April 19, 1997, being found only two days after 168P22.1. In terms of its 45 cells, it is the second smallest known non-trivial period 22 oscillator, behind 36P22 with only 36 cells. It contains a bookend acting as an induction coil.
Whereas its rotor reflects itself after half a period, saving two live cells by using a bookend rather than a house as an induction coil breaks the overall symmetry of the figure.
-cell variant of champagne glassRLE: here
- ↑ Dean Hickerson's "New billiard tables" oscillator collection
- ↑ "Class 2 Objects Catalog". Retrieved on April 9, 2009.
- 45P22.1 at Heinrich Koenig's Game of Life Object Catalogs