Block on cover is a 12-bit still life. It consists of a block stabilizing a cover.
Block and two tails is the fifty-sixth most common still life in Achim Flammenkamp's census, being less common than trans-hook and R-bee but more common than cis-boat on dock. It is also the sixty-nineth most common object on Adam P. Goucher's Catagolue.
On April 4, 2007 Dean Hickerson found a 4-glider synthesis of this still life.
- ↑ Achim Flammenkamp (September 7, 2004). "Most seen natural occurring ash objects in Game of Life". Retrieved on January 15, 2009.
- ↑ Adam P. Goucher. "Statistics". Catagolue. Retrieved on June 24, 2016.
- ↑ Dean Hickerson's 2, 3, and 4-glider syntheses pattern collection