#C four Snark catalyst variants
#C Top: original variant by Mike Playle
#C Left: Shannon Omick (better clearance on a diagonal)
#C Right: Heinrich Koenig (better clearance on a different diagonal)
#C Bottom: Simon Ekström (better clearance on two diagonals)
x = 51, y = 52, rule = B3/S23
#C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]]
#C [[ THEME 6 GRID GRIDMAJOR 0 ZOOM 8 HEIGHT 480 THUMBLAUNCH THUMBSIZE 2 ]]
four Snark catalyst variants --
Top: original variant by Mike Playle
Left: Shannon Omick (better clearance on a diagonal)
Right: Heinrich Koenig (better clearance on a different diagonal)
Bottom: Simon Ekström (better clearance on two diagonals)
Given its small repeat time, the Snark made oscillators of previously unknown periods of 43 and 53 trivial.
It also made most large symmetrical Herschel-loop guns obsolete, since it is now possible to make use of the Herschel gliders with a shorter path of the Herschel track itself. 
The period 4 reflector with repeat time 52 was used for p52+4n glider streams before the Snark was discovered.