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x = 5, y = 2, rule = B3/S23 2ob2o$2ob2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C Still life
Pattern type Pseudo still life
Number of cells 8
Bounding box 5×2
Discovered by Unknown
Year of discovery Unknown

The bi-block is a common formation of two blocks and the smallest and most common[1] pseudo still life. Similar pseudo still lifes can be formed by considering any rectangular array of blocks, some of which are shown below.

Image gallery

A tri-block
RLE: here
A 2×3 group of blocks
RLE: here


  1. "Census Results in Conway's Game of Life". Online Life-Like CA Soup Search. Retrieved on July 12, 2009.

External links