Pre-block

Pre-block
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 ]]
View static image
Pattern type	Still life component
Number of cells	3
Bounding box	2 × 2
Static symmetry	D2_x
Discovered by	John Conway
Year of discovery	1969
Rules Outer-totalistic rules B3/S23 – B345678/S012345678 # of rules 212 = 4096 Isotropic rules B3a/S2ae3a – B2-a345678/S012345678
Glider synthesis Fewest gliders 2 Uploaded synthesis RLE preblock_synth.rle
Pattern files Plaintext preblock.cells RLE preblock.rle

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.

Extensibility

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

• 
  Pre-pre-block
• 
  Pre-pre-pre-block
• 
  Pre⁴-block
• 
  Pre⁵-block

See also

• Grin

External links

• Pre-block at the Life Lexicon