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x = 52, y = 17, rule = B3/S23 2o48b2o$bo48bo$bobo21b2o21bobo$2b2o8bo12b2o12b2o7b2o$11b2o26bobo$10b2o 29bo$11b2o2b2o22b3o4$11b2o2b2o22b3o$10b2o29bo$11b2o26bobo$2b2o8bo12b2o 12b2o7b2o$bobo21b2o21bobo$bo48bo$2o48b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ GPS 10 ZOOM 10 LOOP 100 ]]
Pattern type Oscillator
Oscillator type Shuttle
Number of cells 70
Bounding box 52×17
Period 100
Mod 100
Heat 52
Volatility 0.95
Strict volatility 0.95
Discovered by Bill Gosper
Year of discovery Unknown

Centinal is a period-100 shuttle oscillator that was found by Bill Gosper no earlier than 1973 and no later than 1987, being the first oscillator of this period to be discovered. It combines the mechanisms of the period 46 and period 54 shuttles. It is able to reflect gliders by 90 degrees, a property that Gosper used to construct the p1100 MWSS gun.[1]

Image gallery

Centinal about to reflect a glider
Download RLE: click here

See also


  1. Dean Hickerson's oscillator stamp collection. Retrieved on March 14, 2020.

External links

  • 70P100.1 at Heinrich Koenig's Game of Life Object Catalogs