|Number of cells||7|
|Year of discovery||Unknown|
Die hard is a 7-cell methuselah (essentially a collision between a block and the traffic light sequence) that vanishes after 130 generations, which is conjectured to be the limit for patterns of 7 or fewer cells. Note that there is no limit for higher numbers of cells, as eight cells suffice to have a glider heading towards an arbitrarily distant blinker.
Alternatively, die hard may refer to any methuselah that eventually vanishes.
In other rules
In HighLife, despite the instability of the traffic light sequence, the die hard still works, dissapearing after 119 generations.
- Die hard at the Life Lexicon