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x = 18, y = 11, rule = B3/S23 bo14bo$obo3b3o6bobo$bo4bobo7bo$6b3o4$6b3o$bo4bobo7bo$obo3b3o6bobo$bo 14bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ GPS 6 LOOP 30 THUMBSIZE 3 WIDTH 600 HEIGHT 480 ]]
Pattern type Oscillator
Oscillator type Shuttle
Number of cells 28
Bounding box 18×15
Period 30
Mod 15
Heat 22.4
Volatility 0.91
Strict volatility 0.91
Discovered by David Buckingham
Year of discovery 1980

Eureka (or pre-pulsar shuttle 30) is a period 30 pre-pulsar shuttle oscillator in which two 15-generation pre-pulsar shuttle mechanisms each composed of two tubs hassle a pre-pulsar. It was found by David Buckingham in August 1980. A slightly different period 30 shuttle can be created by shifting the top half of the shuttle two cells to the left or right (see below). This allows the outer tubs to be replaced with blocks, creating a domino sparker suitable for a p30 bouncer from both ends, shifted 15 gens apart.

Image gallery

Generation 1 of Eureka, which shows that the object being hassled is really a pre-pulsar
A slight variant of Eureka
Download RLE: click here

External links

  • 28P30.1 at Heinrich Koenig's Game of Life Object Catalogs