Pipsquirter 2

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Pipsquirter 2
x = 13, y = 22, rule = B3/S23 6b2o$6bobo$8bo$3bo2bob2o$3b4o$7b2o2b2o$3b4o$obo3bob2o$2ob2obobo$3bo4bo $3bobobob2o$2obobobobo$obo4bobo$2bob2obo2b2o$2bobo3bobo$b2o2bob2obo$2b obo4bo$2bo3b3o$3b2obo$8b3o$b7o2bo$bo2bo2bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ GPS 3 ZOOM 12 LOOP 7 ]]
Pattern type Oscillator
Number of cells 89
Bounding box 13×22
Period 7
Mod 7
Heat 15.4
Volatility 0.34
Strict volatility 0.34
Discovered by Noam Elkies
Year of discovery 1999

Pipsquirter 2 is a period-7 pipsquirter discovered by Noam Elkies in August, 1999.[1] Because of its easily-accessible domino spark, it is useful in the construction of larger patterns such as the p49 glider shuttle, the first known period 49 oscillator.

As a reflector

Pipsquirter 2 is most useful because of its ability to act as a 90-degree glider reflector (see p7 bouncer) when it is combined with a block, boat and eater 1. It takes 9 generations to recover from the impact, and the input path (in green) and output path (in red) of the glider are shown below. This reaction is the basis of the p49 glider shuttle and the bricklayer.

Pipsquirter 2 acting as a reflector
RLE: here

A version of the pipsquirter stator with slightly higher clearance is shown in the p7 bouncer article.


Variant by Karel Suhajda,
24 Jan 2003
RLE: here
Thinner form
RLE: here
True period 56 gun
RLE: here

See also


  1. "reflector". The Life Lexicon. Stephen Silver.

External links