Test tube baby

Test tube baby
2o4b2o$obo2bobo$2bo2bo2b$2bo2bo2b$3b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ HEIGHT 600 WIDTH 600 THUMBSIZE 3 ZOOM 48 GPS 2 ]]
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Pattern type	Oscillator
Family	Test tube baby
Number of cells	14
Bounding box	8 × 5
Frequency class	29.0
Period	2 (mod: 2)
Heat	2
Volatility	0.13 | 0.13
Kinetic symmetry	-e
Rotor type	Orthogonal on-off
Discovered by	Unknown
Year of discovery	Unknown
Rules Outer-totalistic rules B3/S23 – B378/S01235678 # of rules 28 = 256 Isotropic rules B3i/S2-cn3enq – B2-ae34-anw5-q6-k78/S01234-t5678
Glider synthesis Fewest gliders 5 Catagolue-generated RLE synthesis Uploaded synthesis RLE testtubebaby_synth.rle
Pattern files Plaintext testtubebaby.cells RLE testtubebaby.rle
Identifiers apgcode xp2_31egge13 Pentadecathlon ID 14P2.7

Test tube baby is a period-2 oscillator, being the smallest oscillator to support the two-cell domino rotor. It and its variants are occasionally considered to be billiard tables.

Uses

The test tube baby is sometimes used when two eater 1s need to be placed close together; the eating mechanism works identically, regardless of the phase of the oscillator.

Occurrence

See also: List of common oscillators

Test tube baby is about the twenty-fifth most common naturally-occurring oscillator in Achim Flammenkamp's census, being less common than cis-beacon on anvil and more common than octagon 2. It is the 24th most common oscillator on Adam P. Goucher's Catagolue.

It is the most common billiard table naturally, depending on the definition of billiard table.

Glider synthesis

A 5-glider synthesis of this oscillator was found and submitted to Catagolue by Carson Cheng in March 2022.

x = 18, y = 11, rule = B3/S23 bo14bo$2bo5b2o5bo$3o4bo2bo4b3o$7bo2bo$5b2o4b2o$4bo8bo$4bo8bo$5b2o4b2o$7bo2bo$7bo2bo$8b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ HEIGHT 400 THUMBSIZE 2 ZOOM 14 THEME Book AUTOSTART GPS 6 T 0 PAUSE 1 T 20 PAUSE 1 LOOP 25 ]]

Two gliders convert a lake 2 into a test tube baby (click above to open LifeViewer)

Variants

pattern	name	description	commonness
	Odd test tube baby	a tub is used to stabilize one corner	~55th most common naturally-occurring oscillator in Achim Flammenkamp's census, 59th most common oscillator on Adam P. Goucher's Catagolue
	Tub test tube baby	tubs used to stabilize both corners	~29th most common naturally-occurring oscillator in Achim Flammenkamp's census, 29th most common oscillator on Adam P. Goucher's Catagolue
	Claw test tube baby	a claw is used to stabilize one corner	96th most common oscillator on Adam P. Goucher's Catagolue
	Claws test tube baby	claw used to stabilize both corners
	Loaf test tube baby	loaf used to stabilize both corners
	Hooks test tube baby	hook used to stabilize both corners
	Boat test tube baby	boat used to stabilize both corners
	Beehive test tube baby	beehive used to stabilize one corner	77th most common oscillator on Adam P. Goucher's Catagolue
	Beehives test tube baby	beehive used to stabilize both corners
	Mangoes test tube baby	mango used to stabilize both corners

See also

• Krake, two eater 1s placed one cell closer together
• Honey thieves with test tube baby, an oscillator using it.

External links

• Test tube baby at the Life Lexicon
• Test tube baby at Adam P. Goucher's Catagolue
• 14P2.7 at Heinrich Koenig's Game of Life Object Catalogs