Two blockers hassling R-pentomino

Two blockers hassling R-pentomino
x = 30, y = 14, rule = B3/S23 4b2o19bo$4o4b2o10b3ob2o2b2o$3ob2o2b2o10b4o4b2o$5bo18b2o4$7b2o12b2o$7b2o12b2o 2$18b3o$17bo$17bo2bo$18b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]]
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Pattern type	Oscillator
Number of cells	47
Bounding box	30 × 19
Period	72
Mod	36
Heat	34.1
Volatility	0.97
Strict volatility	0.70
Discovered by	Robert Wainwright
Year of discovery	1990
Rules Outer-totalistic rules B3/S23 – B38/S23 # of rules 21 = 2 Isotropic rules B3/S23 – B34e6c8/S234ce5a6ein7e
Glider synthesis Fewest gliders 18† Catagolue-generated RLE synthesis Uploaded synthesis RLE twoblockershasslingrpentomino_synth.rle †Can be constructed with 15 gliders using the reverse caber tosser universal constructor.
Pattern files Plaintext twoblockershasslingrpentomino.cells RLE twoblockershasslingrpentomino.rle
Identifiers apgcode xp72_66625dw66y66664abw66zy3ccy8cczyd6995 Pentadecathlon ID 47P72.1

Two blockers hassling R-pentomino is a period 72 oscillator. It was the first period 72 oscillator to be found, and was discovered by Robert Wainwright in July 1990.

It is made up of two blockers that hassle two blocks and an R-pentomino. It makes appearances in many large guns such as the gunstars and new gun 2. On January 12, 2016 Tanner Jacobi found a way to replace the blockers with still lifes.

x = 26, y = 20, rule = B3/S23 o24bo$3o20b3o$3bo18bo$2b2o18b2o3$19bo$19b2o$9b2o9bo$8b2o9bo$8bo8bobo$ 9bo7bobo$5b2o11bo$5b2o3$7b2o8b2o$3b2obobo8bobob2o$3bob2obobo4bobob2obo $9b2o4b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBNAIL THUMBSIZE 2 HEIGHT 360 THEME 6 GPS 36 LOOP 72 ZOOM 10 AUTOSTART ]]

Still life-supported oscillator by Tanner Jacobi (click above to open LifeViewer) RLE: here Plaintext: here

External links

• Two blockers hassling R-pentomino at Adam P. Goucher's Catagolue

• 47P72.1 at Heinrich Koenig's Game of Life Object Catalogs