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x = 2, y = 2, rule = B3/S23 o$2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 3 ZOOM 21 HEIGHT 400 SUPPRESS ]] #C [[ ZOOM 60 ]]
Pattern type Still life component
Number of cells 3
Bounding box 2 × 2
Discovered by John Conway
Year of discovery 1969

Pre-block (or latent block), a triomino, is a common parent of the block. Given its compactness and distinctive form, it is a recognizable component of many other patterns, such as boat, ship, aircraft carrier, block and glider or snake; a mirrored pair comprise one phase of a beacon.

The pre-block is similar to the tub, boat, beehive and such in the sense that it can be augmented with items like tails, as in eater 1 and integral sign.

In terms of its 3 cells, it is the smallest induction coil.

A glider hitting a pre-block can produce a LWSS or MWSS; this is detailed in pre-pre-block.


Pre-block can be infinitely extended, as illustrated by the following:

See also

External links