Turtle
| Turtle | |||||||||
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| Pattern type | Spaceship | ||||||||
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| Number of cells | 44 | ||||||||
| Bounding box | 13 × 12 | ||||||||
| Direction | Orthogonal | ||||||||
| Period | 3 (mod: 3) | ||||||||
| Speed | c/3 | c/3 | ||||||||
| Heat | 56 | ||||||||
| Kinetic symmetry | -e | ||||||||
| Discovered by | Dean Hickerson | ||||||||
| Year of discovery | 1989 | ||||||||
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Turtle is an c/3 orthogonal spaceship found by Dean Hickerson in August 1989. It is one of few non-standard spaceships that also works in the HighLife rule. The domino spark that the turtle produces at its back was essential in the creation of the first sawtooth pattern, sawtooth 1212.
Tagalongs
| The smallest tagalong of the turtle (click above to open LifeViewer) Catagolue: here |
In April 1992, David Bell found an extensible tagalong for the turtle.
| An extensible turtle tagalong (click above to open LifeViewer) RLE: here Plaintext: here Catagolue: here |
Glider synthesis
On December 3, 2020, Goldtiger997 posted a final step for a glider synthesis of this spaceship.[1] The following day, Goldtiger997 found a synthesis for the final base constellation, giving a 241-glider synthesis of the spaceship.[2]
Later reductions of the synthesis cost included a 240G synthesis (April 26, 2021),[3] a 237G synthesis (May 15, 2021),[4] a 228G synthesis (August 27, 2021),[5] a 227G synthesis (October 4, 2021),[6] a 226G synthesis (August 21, 2022),[7] a 225G synthesis (November 28, 2022).[8]
As of March 8, 2023, cheapest known glider construction of the turtle uses 225 gliders.[9]
See also
References
- ↑ Goldtiger997 (December 3, 2020). Re: Small Spaceship Syntheses (discussion thread) at the ConwayLife.com forums
- ↑ Goldtiger997 (December 4, 2020). Re: Small Spaceship Syntheses (discussion thread) at the ConwayLife.com forums
- ↑ shinjuku (#1210329861) (April 26, 2021). Job triggered by Adam P. Goucher at GitLab Catagolue project.
- ↑ shinjuku (#1264301791) (May 15, 2021). Job triggered by Adam P. Goucher at GitLab Catagolue project.
- ↑ shinjuku (#1539695062) (August 27, 2021). Job triggered by Adam P. Goucher at GitLab Catagolue project.
- ↑ shinjuku (#1646671448) (October 4, 2021). Job triggered by Adam P. Goucher at GitLab Catagolue project.
- ↑ shinjuku (#2911640928) (August 21, 2022). Job triggered by Adam P. Goucher at GitLab Catagolue project.
- ↑ shinjuku (#3385551876) (November 28, 2022). Job triggered by Adam P. Goucher at GitLab Catagolue project.
- ↑ xq3_3u0228mc53bgzof0882d6koq1 at Adam P. Goucher's Catagolue
External links
- Turtle at the Life Lexicon
- Life (B3/S23) at David Eppstein's Glider Database
- 44P3H1V0.2 at Heinrich Koenig's Game of Life Object Catalogs
- Turtle at Adam P. Goucher's Catagolue
- Patterns
- Spaceships with 44 cells
- Periodic objects with minimum population 44
- Patterns with 44 cells
- Patterns found by Dean Hickerson
- Patterns found in 1989
- Patterns that can be constructed with between 200 and 299 gliders
- Spaceships
- Spaceships with period 3
- Orthogonal spaceships
- Spaceships with speed c/3
- Spaceships with unsimplified speed c/3
- Spaceships with heat 56
- Spaceships with mod 3
- Spaceships with -e symmetry