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Revision as of 17:02, 10 May 2019 by Moosey (talk | contribs) (Depends on how we define flipper, so I’ll just say this to clarify)
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2o2b2o$obo2bo$4bo$bo$o2bobo$2o2b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ LOOP 2 GPS 2 THUMBSIZE 2 ]]
Pattern type Oscillator
Oscillator type Muttering moat
Family Barberpole
Number of cells 16
Bounding box 6×6
Period 2
Mod 1
Heat 8
Volatility 0.40
Strict volatility 0.40
Rotor type Clock
Discovered by Robert Kraus
Year of discovery 1971

Quad (or barberpole intersection[1]) is a period 2 oscillator and muttering moat that was found in April 1971 by Robert Kraus. It has the same rotor as the clock. It and mold are the only flippers that fit inside a 6 × 6 bounding box; However, mold is period 4.

See also


  1. Eric Weisstein. "Quad". Eric Weisstein's Treasure Trove of Life. Retrieved on May 1, 2009.

External links

  • 16P2.19 at Heinrich Koenig's Game of Life Object Catalogs