David Hilbert/Snippet

David Hilbert was the first period-23 oscillator to be discovered. It was found by Luka Okanishi on November 24, 2019 based on a partial result by praosylen. It consists of two copies of an engine, itself consisting of a B-heptomino being hassled by two unusual catalysts and a block, supported by a known period-agnostic beehive shuttle mechanism (seen in, for example, an extension of the carnival shuttle). There are several isomers known. A 101-glider synthesis for one of these variants was posted by Goldtiger997 on December 29. David Hilbert was voted Pattern of the Year for 2019 on the ConwayLife.com forums.