Duoplet

Duoplet
x = 15, y = 15, rule = B3/S23 12bo$10bobo$11b2o$14bo$13bo4$9bo$8bo$bo$2bo$3o$4bo$3bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART THUMBSIZE 2 GPS 2 ZOOM 16 HEIGHT 480 PAUSE 2 T 3 PAUSE 2 LOOP 4 ]]
View static image
Pattern type	Spark
Number of cells	2
Bounding box	2×2
Discovered by	Unknown
Year of discovery	Unknown
Rules Outer-totalistic rules B3/S23 – B3678/S02378 Important rules Conway Life # of rules 26 = 64 Isotropic rules B3-cy/S2-ik3aijnr – B2in34-ry5-n678/S0234-ak5-ij6-c78
Pattern files Plaintext duoplet.cells RLE duoplet.rle

The duoplet is a two-cell pattern, one of two 2-cell polyplets (the other one being the domino). It is occasionally seen as a spark, and is periodically produced by certain oscillators such as 41P7.2 (incapable of reflecting gliders) and 34P14 shuttle (capable of reflecting gliders).

It can reflect a glider by 90 degrees, as shown in the infobox.

In other rules

It is a period 2 oscillator and also a phoenix in many Life-like cellular automata, namely all rules with B2 and without B0, B1 or S1 such as Seeds. More specifically, it requires the isotropic non-totalistic transition B2e without S1c, as shown on the left.

In rules without B0, B1 or B2 (B2e), and with S1 (S1c), it is a still life.

See also

• Diagonal on-off

External links

• Duoplet at the Life Lexicon

• Duoplet (rule b2s) at Adam P. Goucher's Catagolue