Unusual NT overcall

2NT Over 1 of a suit shows either a weak or a strong 2-suiter, forcing.

• 2NT Over 1C: 5-card D and 5-card H.
• 2NT Over 1D: 5-card C and 5-card H.
• 2NT Over 1H/S: 5-card C and 5-card D.
• 4NT Over 4H/S: 5-card C and 5-card D.

• Takeout to a suit shown by partner: No interest in game.
• Jump Takeout to a suit shown by partner: Good support, preemptive.
• Cue-bid: Game or slam try, forcing.
• New suit: Natural, non-forcing.
• 3NT: Play.
• 4NT: Blackwood.