Quadri-Snark

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Quadri-Snark
x = 105, y = 96, rule = B3/S23 bo$2bo$3o10$13bo$14bo$12b3o10$25bo$26bo$24b3o10$37bo$38bo$36b3o10$49bo $50bo$48b3o10$61bo$62bo$60b3o10$73bo$74bo$72b3o14b2o$90bo$88bo5b2o$88b 2o5bo$95bob2o$88b2o2b2obo2bo$88b2o3bob2o$93bo$92b2o$99b2o$85bo13bobo$ 86bo14bo$84b3o14bob2o$91b2o5b2obobo$91b2o5b2obobo$101bob2o$82b2o14b4o 2bo$81bobo14bo3b2o$81bo18b2o$80b2o19bo$99bo$99b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ HEIGHT 480 THUMBSIZE 2 ZOOM 8 X 28 Y 26 GPS 30 LOOP 192 ]]
Pattern type Stable reflector
Number of cells 70
Bounding box 25 × 22
Angle 90°
Repeat time 48
Period multiplier
Colour Colour-preserving
Discovered by Tanner Jacobi
Year of discovery 2017

The quadri-Snark is a period-multiplying colour-preserving signal conduit found by Tanner Jacobi in October 2017, producing one output glider for every four input gliders.[1] It is made by replacing one of the eaters in a tremi-Snark with a catalyst found using Bellman. The catalyst cause the formation of a tub which then requires an additional glider to delete. However, this adds 5 ticks to the repeat time, so that it becomes 48. If period quadrupling is needed with a colour-changing reaction, a CP semi-Snark, CC semi-Snark and the regular Snark can be used in series, or a period-multiplying Herschel conduit can be connected to a syringe and an appropriately chosen Herschel-to-glider converter.

The quadri-Snark was part of a series of new stable pulse dividers (the others being the tremi-Snark and the semi-cenarks) which collectively ranked third place in the Pattern of the Year 2017 competition on the ConwayLife.com forums, behind Tanner's p46 and the 2-engine Cordership.[2]

A mold can replace one of the two catalysts to decrease the size of the quadri-snark; with evenly spaced gliders, this will always work because four times any number is a multiple of four, but with irregularly spaced gliders that do not add up to a multiple of four, the mold will spark in the wrong generation.

x = 97, y = 88, rule = B3/S23 o$b2o$2o10$12bo$13b2o$12b2o10$24bo$25b2o$24b2o10$36bo$37b2o$36b2o10$ 48bo$49b2o$48b2o10$60bo$61b2o$60b2o5$81b2o$80bo2bo$80bobobo$81bo2bo$ 85bo$72bo9bobo$73b2o5bo$72b2o6bo$80b2o9b2o$82bo8bobo$81b2o10bo$78b4ob 2o8bob2o$78b2o2b2o6b2obobo$77b2obo2b2ob2o2b2obobo$78bo2bobo9bob2o$74b 2o2bo4b2o5b4o2bo$73bobo14bo3b2o$73bo8bo9b2o$72b2o5bo2bo10bo$79bobo9bo$ 91b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ WIDTH 600 HEIGHT 480 THUMBSIZE 2 ZOOM 8 X 28 Y 26 GPS 30 LOOP 192 ]]
The mold variant of the quadri-snark, with generation 0 showing the mold's interaction
(click above to open LifeViewer)
RLE: here Plaintext: here

See also

References

  1. Tanner Jacobi (October 24, 2017). Re: Thread For Your Bellman Finds (discussion thread) at the ConwayLife.com forums
  2. Dave Greene (February 19, 2018). Re: Pattern of the Year 2017 -- votes (discussion thread) at the ConwayLife.com forums

External links