Pi splitter

Pi splitter
x = 20, y = 14, rule = B3/S23 15bo$14bobo$14bobo$13b2ob2o$12bo2bo2bo$3o8bobobobobo$2bo9bobobobo$3o 11bobo$14bo2bo$15b2o3$14b2o$14b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]]
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Pattern type	Catalyst
Number of cells	31
Bounding box	9 × 14
Static symmetry	C1
Discovered by	Ivan Fomichev
Year of discovery	2013
Rules Outer-totalistic rules B/S23 – B378/S012345678 # of rules 210 = 1024 Isotropic rules B/S2cik3-eijn – B2cin34-aejkn5-kry6-i78/S012345678
Glider synthesis Fewest gliders 31† †Can be constructed with 15 gliders using the reverse caber tosser universal constructor.
Pattern files Plaintext pisplitter.cells RLE pisplitter.rle
Identifiers apgcode xs31_x3jgz8k87o69k8zw17871

The pi splitter is a catalyst found by codeholic using Bellman in August 2013, transforming ("splitting") a pi-heptomino into two gliders. It consists of a regenerative loop used to regenerate a tub motif. A glider synthesis for a reduced form of the catalyst was completed by Extrementhusiast later the same month.

In May 2022, ljkiernan1 found a Spartan replacement consisting of two beehives and two tubs, using mvr's symmetric version of CatForce.

The catalyst is widely used in glider guns and other engineered patterns.

x = 14, y = 20, rule = B3/S23 5bo$4bobo$3bobo2bo$b3o2b2obo$o3b2o3bo2b2o$b3o2b3o3b2o$3bobo$4bobo$5bo 9$5b3o$5bobo$5bobo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ HEIGHT 600 WIDTH 600 THUMBSIZE 2 ZOOM 14 ]]

A reduced form (click above to open LifeViewer) Catagolue: here

x = 21, y = 16, rule = B3/S23 bo17bo$obo15bobo$bo5b2o3b2o5bo$6bo2bobo2bo$7b2o3b2o9$9b3o$9bobo$9bobo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ HEIGHT 600 WIDTH 600 THUMBSIZE 2 ZOOM 14 ]]

A Spartan replacement with lower population and different clearance (click above to open LifeViewer) Catagolue: here

2o$obo$2bo$2b2o$4bo6b3o$2b3o6b3o$bo8bobo$b2o7b2o8$12bo$11bobo$10bobo$8b3o2b3o3b2o$7bo3b2o3bo2b2o$8b3o2b2obo$10bobo2bo$11bobo$12bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ HEIGHT 600 WIDTH 600 THUMBSIZE 2 ZOOM 14 ]]

Alternative usage of Pi splitter, showing that it has multiple applications. (click above to open LifeViewer)