Riley's breeder
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| Riley's breeder | |||||||||
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| Pattern type | Breeder | ||||||||
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| Number of cells | 38 | ||||||||
| Bounding box | 135 × 41 | ||||||||
| Direction | Orthogonal | ||||||||
| Period | 140 | ||||||||
| Speed | c/2 | ||||||||
| Discovered by | Mitchell Riley | ||||||||
| Year of discovery | 2006 | ||||||||
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Riley's breeder is a surprisingly small 38-cell quadratic growth pattern, discovered by Mitchell Riley in July 2006.[1] It comprises a puffer 2 and two LWSSes. It produces a block-laying switch engine every 140 generations, filling three eighths of the Life plane. It has fewer cells than metacatacryst, and fits in a bounding box several orders of magnitude smaller.
It was originally discovered as a 40-cell pattern, but can be backtracked two generations by replacing the B-heptomino with a hexaplet.
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Generation 2000 of Riley's breeder
References
- ↑ New Quadratic Growth Puffer at Game of Life News. Posted by Heinrich Koenig on August 12, 2006.