Eater bridge eater

From LifeWiki
Jump to navigation Jump to search
Eater bridge eater
x = 8, y = 5, rule = B3/S23 2o$o5b2o$b3obobo$3bobo$4b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 3 ZOOM 21 HEIGHT 400 SUPPRESS ]] [[ ZOOM 45 ]]
Pattern type Strict still life
Number of cells 14
Bounding box 8 × 5
Frequency class 27.9
Static symmetry n
Discovered by Unknown
Year of discovery Unknown
Ambox notice.png This article may require cleanup to meet LifeWiki's quality standards.

Eater bridge eater is a 14-cell still life composed of two diagonally-touching eater 1s.

Eater bridge eater is the 81st most common 14-cell still life out of 619.

Applications

This still life is commonly used as a catalyst in oscillators and signal circuitry when two eaters are needed to be placed nearby. In the F116, Speed Tunnel, F176 and Fx176 conduits, its two component eaters have standard eating functions.

In the p23 honey farm hassler, Roseluck, HLx185B, Bronco, NW-2T16 and the Spartan version of 135-degree MWSS-to-G, the catalytic site is on the opposite side of the object, and the slightly smaller eater bridge snake can be used instead. See Tutorials/Catalyses for descriptions on how the still life acts as a replacement catalyst for a block or a ship.

In the p8 glider reflector and 30P6.1, the eater bridge eater is used similarly to a grin reagent, where it reacts with the grin to create another grin in 4 generations. However this application has few known uses due to its low recovery time causing it to react with the grin if it is turned again, preventing a smaller version of 128P12. It also has no drifter, so it cannot be used to create a LCM oscillator by welding it with loading dock.

Naming

A more precise name for this still life is Mark Niemiec's Eater tail bridge behind eater tail. This is too long and technical to find its way into common usage, but it correctly distinguishes this object from related still lifes such as eater tail bridge eater tail, eater head tie up eater head, eater head tie down eater head, eater head bridge eater tail, and eater head behind eater.

Eater tie eater and welded eaters have also been used to refer to this still life on occasion, but both of these terms are technically incorrect. A weld implies an overlap between welded objects, and a tie is a point-to-point connection along the lines of a boat-tie. The name eater tie eater has been in use for many years in Mark Niemiec's database, referring to a different object that is also named as valentine.

Construction

All strict still lifes with a population of 22 or fewer cells, all oscillators with 16 or fewer cells, and all spaceships with 31 or fewer cells are known to be glider-constructible. A glider synthesis of this object can be found in the infobox to the right.

In the case of the MWSS-to-G, there are known recipes that allow the eater-bridge-eater variant to be constructed with slow salvos in any orientation, so this variant is more commonly used.

x = 45, y = 27, rule = B3/S23 28bo$26b2o$27b2o9$3bo$4bo$2b3o4bo$7bobo$8b2o31b2o$40bobo$38b3obobo$37bo5b2o$37b2o$12b3o$14bo$13bo2$2o$b2o$o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THEME Book ZOOM 10 X 0 Y 0 AUTOSTART GPS 12 T 0 PAUSE 3 T 31 PAUSE 1 T 41 PAUSE 2 LOOP 42 ]]
A 5G synthesis[1]
(click above to open LifeViewer)
x = 23, y = 18, rule = B3/S23 11b2o$11b2o5$2o$2o4bo4b2o$5bobo2bo2bo$5b2o4b2o$21b2o$21b2o$8b2o$8bobo$9bo$b3o$3bo$2bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THEME Book ZOOM 10 X 0 Y 0 AUTOSTART GPS 12 T 0 PAUSE 3 T 57 PAUSE 2 LOOP 58 ]]
A 6SL 1G seed[2][3]
(click above to open LifeViewer)
x = 43, y = 29, rule = B3/S23 33bo$33bobo$33b2o14$3bo$4bo$2b3o34b2o$38bobo$14b2o4b3o13b3obobo$15b2o3bo14bo5b2o$14bo6bo13b2o3$2o$b2o17b3o$o19bo$21bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THEME Book ZOOM 8 X 0 Y 0 AUTOSTART GPS 12 T 0 PAUSE 3 T 7 PAUSE 1 T 38 PAUSE 1 T 76 PAUSE 2 LOOP 77 ]]
A 6G synthesis[4]
(click above to open LifeViewer)
x = 42, y = 20, rule = B3/S23 8bo$9bo$7b3o3$2bobo18bo14b2o$3b2o16b2o14bobo$3bo18b2o11b3obobo$34bo5b2o$34b2o2$3o$2bo$bo$8bo$8b2o$7bobo$28b2o$27b2o$29bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THEME Book ZOOM 10 X 0 Y 0 AUTOSTART GPS 12 T 0 PAUSE 3 T 17 PAUSE 1 T 51 PAUSE 2 LOOP 52 ]]
A 6G synthesis[4]
(click above to open LifeViewer)

See also

References

  1. xs14_354cgs26 at Adam P. Goucher's Catagolue
  2. chris_c (February 21, 2015). Re: The Hunting of the New Herschel Conduits (discussion thread) at the ConwayLife.com forums
  3. chris_c (April 13, 2015). Re: Slow salvo seeds (discussion thread) at the ConwayLife.com forums
  4. 4.0 4.1 The 619 fourteen-bit still-lifes at Mark D. Niemiec's Life Page (download pattern file: 14/14-172.rle)

External links