IMPs, head-to-head KO match. 1NT was to see how the modern game worked. 2NT was old-fashioned lebensohl (maybe weak with either minor, maybe some FG or invitational hands with spades or no heart stop).
What call do you make if:
Partner passes in tempo?
Partner bids 4♠ in tempo?
Partner passes slowly?
Partner bids 4♠ slowly?
Benefits include:
Plus... it's free!