Interchange

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Interchange
2b3o4b3o2b2$o12bo$o12bo$o12bo2$2b3o4b3o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ LOOP 2 GPS 2 THUMBSIZE 2 ]]
Pattern type Constellation
Oscillator
Number of cells 18
Bounding box 16×9
Period 2
Mod 2
Heat 24
Volatility 0.80
Strict volatility 0.80
Discovered by Hugh Thompson
Year of discovery 1971

Interchange is a common constellation of six blinkers.

There are two different interchanges; the more common one is displayed to the right. The less common variant has five cells between the left and right halves instead of four.

Two gliders reflected along an axis of symmetry with an even number of rows between them form an interchange. With an odd number of rows, it becomes a bi-block instead.

Gallery

3bo$b2ob2o$6bo$o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 4 THUMBSIZE 2 ]]
Unlike most common sequences
which require only five or six cells
the minimum number of cells needed
to form an interchange is seven
(click above to open LifeViewer)

See also

External links