stay behind

If you can, sprint ahead and stay ahead — otherwise slow down and stay well behind

If a twin goes off on a spaceship for a long trip at nearly the speed of light, that twin would be much younger on return to earth than the twin who stayed behind (Fock, 1964; French, 1968; Hawking, 1988; Young, 1992).

When I stayed behind at school with my school friends after lessons, and managed to play up to a hundred games in a single afternoon, the strategy was simple enough: I castled on the opposite side in the middle of violent (and mutual) King attacks.