Semi-cenark

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A semi-cenark is either of two semi-Snark variants discovered by Tanner Jacobi in November 2017. The name is due to the initial converter, which produces a century output for every two input gliders. The minimum safe repeat time is 43 ticks for the smaller initial catalyst shown in CC semi-cenark and CP semi-cenark, or 42 ticks with the slightly larger catalyst variant shown below.

x = 37, y = 37, rule = B3/S23 obo$b2o$bo7$9bobo$10b2o$10bo$13bo$14b2o$13b2o$29bo$27b3o$26bo$26b2o3$ 22bo$14b2o7b2o2bo6b3o$14bo2bo4b2o2bobo7bo$12b2o2b2o8b2o7bo$11bo2b2o$ 11b2o3b2o$16bobo$17bo$34b2o$32bo2bo$21b2o9b3o$22bo6bo$19b3o7b4o$19bo 12bo$31bo$31b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBNAIL THUMBSIZE 2 HEIGHT 480 X 7 Y 5 THEME 6 GPS 20 LOOP 50 ZOOM 16 AUTOSTART ]]
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RLE: here Plaintext: here

There is also the possibility of overclocking at period 36, 38, or 39. The reset glider can be followed immediately by a new trigger glider, as shown above, so the minimum repeat time for an intermittent stream of gliders is only 36 + 14 = 50 ticks.

Also see

External links