7-engine Cordership

7-engine Cordership
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Pattern type	Spaceship
Family	Cordership
Number of cells	180
Bounding box	71×65
Direction	Diagonal
Period	96
Mod	48
Speed	c/12
Speed (unsimplified)	8c/96
Heat	196.3
Discovered by	Dean Hickerson
Year of discovery	1993
Rules Outer-totalistic rules B3/S23 only Important rules Conway Life # of rules 20 = 1 Isotropic rules B3/S23 only
Pattern files Plaintext 7enginecordership.cells RLE 7enginecordership.rle
Identifiers apgcode xq96_yi33zyaooydgs2iczyr77866zy266yrgcc0q996zyyg0j33z0gs8ogyrk1087zxoe2yzybo44oze0333yjg8048gyjeehdc1y1oozyi4aha40782hnezyfg0gyho88gy966zy8ggn723110d74y0oggy6c1g066y1ggzyn11gt5y7137y211zyms0676y8111 Pentadecathlon ID 180P96H8V8.1 Eppstein ID 21362

The 7-engine Cordership is a c/12 diagonal spaceship that was discovered by Dean Hickerson on August 14, 1993. Until the discovery of the 6-engine Cordership almost five years later, it was the Cordership that used the fewest known possible switch engines. Corderships that use as few as 2 engines are now known.

This particular Cordership can be used to reflect gliders in a variety of ways. The image below shows two gliders that will be turned counterclockwise by 90 degrees (in red), a glider that will be reflected 180 degrees (in green), and a glider that will be turned into a southbound lightweight spaceship (in blue). For another method of performing a 180-degree glider reflection using the 7-engine Cordership, see glider loop.

Gliders about to be reflected off of the ship
red:90˚, green:180˚, blue:45˚ RLE: here

See also

• 7-in-a-row Cordership
• Sawtooth 362

External links

• 7-engine Cordership at the Life Pattern Catalog

• The Cordership (glider 21362) at David Eppstein's Glider Database

• 7-engine Cordership at Adam P. Goucher's Catagolue (extended)

• 180P96H8V8.1 at Heinrich Koenig's Game of Life Object Catalogs