将计就计
English Expression:
  1. v.  countermine
  2. v.  counterplot
  3. n.  turn somebody's trick against him
  4. n.  beat sb. at his own game
  5. v.   adapt one's scheme to that of the opponent
  6. v.   deal with an opponent by
  7. v.  taking advantage of his scheme
French Expression:
  1.   tourner à son profit l'artifice de son adversaire, exploiter (ou:déjouer)à son profit les ruses de l'ennemi