Simkin glider gun

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Simkin glider gun
2o5b2o$2o5b2o2$4b2o$4b2o5$22bo3bo$21bo4b2o$20b2o5b2o2b2o$21b2o4bo3b2o$ 22bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ THUMBSIZE 2 ZOOM 12 GPS 20 HEIGHT 480 ]]
Pattern type Gun
Number of cells 29
Bounding box 33×14
Period 120
Barrels 2
Discovered by Michael Simkin
Year of discovery 2015

Simkin glider gun is a glider gun, found by Michael Simkin on April 28, 2015. It consists of a Herschel running in two period-60 conduits, producing infinite copies of the first natural glider. In terms of its 36 cells (by supressing one of the 2 streams using an eater 1) it is the smallest known gun, sharing the record with the Gosper glider gun. In the 29-cell double-barrelled form (shown in the infobox), as well as the pseudo-period boat-bit form, it is the absolute record holder. Its smallest known predecessor has only 21 cells.

The day of its discovery, Chris Cain used it to create a sawtooth pattern with 181 cells.[1]


  1. Chris Cain (April 28, 2015). "Re: Smaller sawtooth". forums. Retrieved on November 16, 2018.

See also