|View static image|
|Number of cells||904|
|Discovered by||Jason Summers|
|Year of discovery||2005|
Halfmax (or half-spacefiller) is a pattern that acts as a spacefiller in half of the Life plane. It was found by Jason Summers in May 2005. It expands in three directions at c/2, producing a triangular region that grows to fill half the plane. All previously-known spacefillers had been diamond-shaped, expanding at c/2 in all four cardinal directions to fill the entire plane.
The version shown to the right was found by Summers on May 21, 2005. Two less compact versions, shown below, were also found earlier that same month.