NT was 15-17
Your NT defense is:
2C = majors, rest natural
2NT = minors
Dbl = penalty. Advancer may pull with weak distributional hands but leave it in with all balanced hands.
You and partner are good local experts. Opponents run of the mill average.
Hand 10 of 12-board set, IMP tourney on BBO. Your score few IMPs on the plus.
Anything else you need to know? And no peeking

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(1NT) by dealer, your turn.