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Blockade image
Pattern type Constellation
Number of cells 16
Bounding box 23×10
Discovered by Unknown
Year of discovery Unknown

The blockade (or four skewed blocks[1]) is a common formation of four blocks and is one of the familiar fours. A common evolutionary sequence that leads to its formation is known as lumps of muck, which can be seen by letting the stairstep hexomino evolve.

See also


  1. Mark D. Niemiec. "Life Objects Sorted by Name (F)". Retrieved on April 30, 2009.

External links

  • Blockade at Eric Weisstein's Treasure Trove of Life