τὸν ἀπὸ γραμμᾶς κινεῖν λίθον → move one's man from this line, move a piece from this line, try one's last chance, make a last ditch effort
P. and V. μετρίως.
soberly: P. and V. σωφρόνως, σεσωφρονισμένως, P. ἐγκρατῶς.