Cross 2

	Cross 2
	<a href="/wiki/File:Cross2.png" class="image" title="Cross 2 image"><img alt="Cross 2 image" src="/w/images/d/d3/Cross2.png" decoding="async" width="137" height="137" /></a>
	<a href="/wiki/File:Cross2.png" class="image" title="Cross 2 image"><img alt="Cross 2 image" src="/w/images/d/d3/Cross2.png" decoding="async" width="137" height="137" /></a>
	View animated image
	View static image
Pattern type	Oscillator
Number of cells	60
Bounding box	15 × 15
Period	3 (mod: 3)
Heat	58.7
Volatility	0.85 \| 0.85
Kinetic symmetry	*c
Discovered by	Hartmut Holzwart
Year of discovery	1993
Rules
Outer-totalistic rules	B3/S23 – B38/S235678
# of rules	25 = 32
Isotropic rules	B3-knqy/S2-n3jry – B2kn34-acin5-ay6-i7c8/S234-airwz5678
Glider synthesis
Fewest gliders	30†
Catagolue-generated RLE	synthesis
Uploaded synthesis RLE	cross2_synth.rle
	†Can be constructed with 15 gliders using the reverse caber tosser universal constructor.
Pattern files
Plaintext	cross2.cells
RLE	cross2.rle
Identifiers
apgcode	xp3_s47117471174szt57y375tz1174471744711

Cross 2 is a period-3 oscillator that was found on February 16, 1993 by Hartmut Holzwart.^[1] It is the second smallest in an infinite family of period 3 oscillators, the first of which is cross. GUYTU6J found a 32-glider synthesis of this oscillator on February 10, 2020.^[2]

Gallery

Generation 1 of cross 2, which led to its name

↑ Dean Hickerson's oscillator stamp collection. Retrieved on March 14, 2020.
↑ GUYTU6J (February 10, 2020). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums