|View static image|
|Number of cells||16|
|Year of discovery||Unknown|
|This article needs to be expanded with: information about the half-blockade, an 8-bit Constellation.|
The blockade 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.
A half-blockade is an 8-bit constellation consisting of two blocks with two empty rows separating them, offset by one cell.