Gain a lead on the far row.
Hold it until your next turn.
Select a piece. To move a line, select its other end, then choose the marked square where the leading piece will land.
History and sources
Epaminondas grew out of Robert Abbott’s Crossings. In 1975 a larger board and the capture of entire phalanxes turned it into a distinct strategy game, named after the Theban general Epaminondas.
The long diagonals of the rectangular board allow more room for manoeuvre. To win, you must hold a numerical advantage after your opponent’s reply.
Sources in Russian: nestorgames rules and the author’s account and an Abstract Games article. This is the basic game without the obstacle variant.