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x = 41, y = 36, rule = B3/S23 2bo$obo$b2o10$25bo$23b3o$22bo$22b2o$7b2o$8bo$8bob2o$9bo2bo23bo$10b2o 24bo$25b2o9b3o$25b2o11bo4$34bo3b2o$33bobo3bo$32bobo3bo$28b2obobo3bo$ 28b2obo2b4obo$32bobo3bobo$28b2ob2o2bo2bobo$29bobo2b2o3bo$17b2o10bobo$ 17b2o11bo! #C [[ THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ THUMBNAIL THUMBSIZE 2 X 4 Y 7 Z 16 WIDTH 600 HEIGHT 480 GPS 20 AUTOSTART PAUSE 2 T 165 PAUSE 2 LOOP 166 ]]
Pattern type Conduit
Conduit type Converter
Conduit for Glider
Converts to Herschel
Number of cells 66
Bounding box 24×34
Recovery time 78 ticks
Spartan? No
Discovered by Tanner Jacobi
Year of discovery 2015

The syringe[1] is a glider-to-Herschel converter composed of an eater 1, a block, a beehive with tail, and a large welded still life[note 1] that combines an eater 2 and an eater 5. It works by converting a bait block into a pi, then hassling the pi into a B-heptomino that restores the bait block over the course of its evolution. Its repeat time is 78, but it can also "overclock" to function with glider streams of period 74 or 75. The syringe was named by Jeremy Tan, describing how it injects a glider into a Herschel system.

The syringe allows much more compactness and timing versatility in signal circuitry than Herschel conduits alone, and in combination with the snark, it can largely replace very long Herschel tracks (if they are not required to be spartan) by simply passing a glider from somewhere near the start to somewhere near the destination. This works similarly to Herschel transmitters and receivers, but in more flexible way. Within 3 days of the syringe's discovery, over half of all known guns from periods 14 to 999 were obsoleted by loops involving a syringe and various snarks.

A variant of the syringe that replaces the welded eater 2 and eater 5 with a separate eater 2 and eater 1 was used in the Demonoid, a self-constructing spaceship. The eater 1 can only be made to fit if the syringe is followed by a dependent conduit. In rare cases where the following conduit does not allow any glider to escape at all (like the dependent beehive-producing H-to-MWSS conduit), only the eater 2 is required.

The syringe was voted on as Pattern of the Year 2015.[2]

See also


  1. Catagoluexs41_8e1eo0kcwo4oz33034al913kp

External links


  1. Tanner Jacobi (March 19, 2015). "Re: Let's find a G-to-X". Retrieved on March 22, 2015.
  2. Alexey Nigin (February 11, 2016). "Re: Pattern of the Year 2015 (Votes)". Retrieved on February 15, 2016.