AnarchyChess

You best bet is to launch a glider at c4. I recommend:

Pattern type Spaceship
Number of cells 5
Bounding box 3 × 3
Frequency class 1.8
Direction Diagonal
Period 4
Mod 2
Speed c/4 | c/4
Heat 4

Historical note: An R-pentomino tracked past T = 69 in late 1969 certainly implies that the glider, and a number of other objects such as blocks and blinkers, were first seen by Conway's group before 1970.