T-nosed p4

T-nosed p4
4b3o4b$5bo5b2$4b3o4b$3bo3bo3b$2bo5bo2b$2bobobobo2b$b2obobob2ob$o2b2ob 2o2bo$2o7b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ TRACKLOOP 4 0 0 GPS 2 THUMBSIZE 2 ]]
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Pattern type	Oscillator
Oscillator type	T-nose
Number of cells	31
Bounding box	11 × 12
Period	4
Mod	4
Heat	15
Volatility	0.55
Strict volatility	0.49
Discovered by	Robert Wainwright
Year of discovery	1989
Rules Outer-totalistic rules B3/S23 – B3/S0238 # of rules 22 = 4 Isotropic rules B3-ceky/S23-acjy – B2n34ceqryz5-eqr6-ik7c/S01c234-airt5-in6-c7c8
Glider synthesis Fewest gliders 42† Catagolue-generated RLE synthesis Uploaded synthesis RLE tnosedp4_synth.rle †Can be constructed with 15 gliders using the reverse caber tosser universal constructor.
Pattern files Plaintext tnosedp4.cells RLE tnosedp4.rle
Identifiers apgcode xp4_35s2e0e2s53zx1iqi1 Pentadecathlon ID 31P4.1

T-nosed p4 is a period-4 oscillator that was found in October 1989 by Robert Wainwright. It can be used as a filter that deletes every other lightweight spaceship in a stream of period 4n + 2. A smaller variant was posted by Tanner Jacobi on December 4, 2017, and a 79-glider synthesis of said variant was found by Jacobi and Mark Niemiec on May 8, 2019. A statorless version is known as well.

x = 17, y = 12, rule = B3/S23 2$7b3o2$6bo3bo$2b2obo5bob2o$2bo11bo$3b2o7b2o$3o2b7o2b3o$o2bo9bo2bo$b2o 5bo5b2o$7b3o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART GPS 2 LOOP 4 THUMBLAUNCH THUMBSIZE 2 THEME 6 ZOOM 16 HEIGHT 320 ]] Variant based on the overweight emulator (click above to open LifeViewer) RLE: here Plaintext: here

x = 10, y = 12, rule = B3/S23 4b3o2$3bo3bo2$3bo2bo$2bo2b2o$bobobo2bo$bob3o3bo$2bobobobo$3bo$3o$o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART GPS 2 LOOP 4 THUMBLAUNCH THUMBSIZE 2 THEME 6 ZOOM 16 HEIGHT 320 ]] Smaller 25-cell variant (click above to open LifeViewer) RLE: here Plaintext: here

x = 36, y = 21, rule = B3/S23 25b2o$9b2o13bo2bo$8bo2bo12bobobo$7bobobo13bo2bo$7bo2bo18bo$6bo19bobo$ 7bobo2$25bo4b3o$3b3o4bo12b2ob2o$8b2ob2o12bo3bo3bo$2bo3bo3bo18bo3bo$2bo 3bo$29bo3bo$2bo3bo21bob3obo$bob3obo20bo5bo$bo5bo19b2obobob2o$2obobob2o 18bo2b2obo$2bob2o2bo20bo3bo$2bo3bo21b2o3b2o$b2o3b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 9 LOOP 36 THUMBLAUNCH THUMBSIZE 2 THEME 6 ZOOM 12 HEIGHT 320 ]] The p36 traffic jam shows that the side sparks of the T-nosed p4 occasionally have uses (click above to open LifeViewer) RLE: here Plaintext: here

x = 11, y = 13, rule = B3/S23 5bo$5bo$4b3o4$3b5o$2bob3obo$2bo5bo$2o2bobo2b2o$bob2ob2obo$bo2bobo2bo$2b2o3b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ HEIGHT 500 THUMBSIZE 3 ZOOM 36 GPS 2 AUTOSTART ]] One half of Achim's p4 (excluding the central row) may act as the stator component of a seminaturally-occurring variant of this oscillator. (click above to open LifeViewer) Catagolue: here

See also

• T-noses (category)

External links

• T-nosed p4 at the Life Lexicon
• T-nosed p4 at Adam P. Goucher's Catagolue
• T-nosed p4 (smaller variant) at Adam P. Goucher's Catagolue
• 31P4.1 at Heinrich Koenig's Game of Life Object Catalogs