# 7-in-a-row Cordership

7-in-a-row Cordership | |||||||||||

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Pattern type | Spaceship | ||||||||||
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Family | Cordership | ||||||||||

Number of cells | 289 | ||||||||||

Bounding box | 114×113 | ||||||||||

Direction | Diagonal | ||||||||||

Period | 96 | ||||||||||

Mod | 48 | ||||||||||

Speed | c/12 | ||||||||||

Speed (unsimplified) | 8c/96 | ||||||||||

Heat | 258.3 | ||||||||||

Discovered by | Dean Hickerson | ||||||||||

Year of discovery | 1998 | ||||||||||

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The **7-in-a-row Cordership** is a diagonal spaceship that was discovered by Dean Hickerson on July 23, 1998.^{[1]} It is one of the smallest known Corderships, and one of the Corderships with a known glider synthesis. It shares many properties with the 6-in-a-row Cordership.

## Synthesis and destruction

A 48-glider synthesis for the 7-in-a-row Cordership has been known since June 2003, consisting of a 21-glider salvo meeting a 27-glider salvo. At that time a gun was constructed that fires 7-in-a-row Corderships; it is known as the V gun due to its shape.

Due to Luka Okanishi's discovery of a three-glider switch engine synthesis in 2017, the 7-in-a-row Cordership can now be constructed with only 25 gliders.

This Cordership can also be eaten, as shown by the pattern below that was created on July 4, 2003, based on a glider-extraction reaction found by Karel Suhajda which might be considered a Cordership Heisenburp, since the Cordership passes by the tub catalyst without being permanently affected. The Cordership eater consists of seven eater 2s and two tubs to do the majority of the eating, along with some Herschel tracks that produce gliders to clean up some blocks that are left behind.

A much more compact eater, or an equally compact Cordership-to-glider converter, can now be constructed thanks to the subsequent discovery of the Snark reflector and the syringe.

## See also

## References

- ↑ Jason Summers' jslife pattern collection.

## External links

- 7-in-a-row Cordership at Adam P. Goucher's Catagolue (extended)

- Patterns
- Patterns with 289 cells
- Patterns found by Dean Hickerson
- Patterns found in 1998
- Patterns that can be constructed with 25 gliders
- Spaceships
- Periodic objects with minimum population 289
- Spaceships with period 96
- Diagonal spaceships
- Spaceships with speed c/12
- Spaceships with unsimplified speed 8c/96
- Spaceships with heat 258
- Cordership variants
- Spaceships with mod 48
- Glide symmetric spaceships