Switch engine ping-pong

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Switch engine ping-pong
Switch engine ping-pong image
Pattern type Breeder
Direction Unknown
Period Unknown
Speed Unknown
Number of cells 23
Bounding box 210515×183739
Discovered by Michael Simkin
Year of discovery 2014

Switch engine ping-pong is a quadratic growth pattern that was found by Michael Simkin on October 29, 2014.[1] In terms of its 23 cells it is the smallest currently known quadratic growth pattern, superseding the previous record holder, 24-cell quadratic growth, also found by Simkin a week earlier.

It is the first such pattern found that uses only 2 switch engines.


  1. Michael Simkin (October 29, 2014). "Re: 23 cells quadratic growth (new record)". Retrieved on October 30, 2014.