Backrake 2
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| Backrake 2 | |||||||||
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| Pattern type | Rake Puffer | ||||||||
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| Number of cells | 65 | ||||||||
| Bounding box | 19 × 26 | ||||||||
| Direction | Orthogonal | ||||||||
| Period | 12 | ||||||||
| Speed | c/2 | ||||||||
| Discovered by | David Buckingham | ||||||||
| Year of discovery | Unknown | ||||||||
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Backrake 2 is a period 12 backrake that was created by David Buckingham. It works by having a front puffer made up of two lightweight spaceships, a middleweight spaceship, and a B-heptomino (much like puffer 2) send debris back to another lightweight and middleweight spaceship, which turn the debris into a backward-moving glider.
Three copies of this backrake feature in total aperiodic.