Scoring: IMP
Pard opens 1♦, you bid 1♥, he tries 1♠.
Some system footnotes. You play XYZ, where (over 1♠):
a) 2♣ is a puppet to 2♦ to invite game
b ) 2♦ over 1♠ is an artificial game force
c) 2N over 1♠ is a transfer to 3♣ indicating less than an invite
d) A jump to 3♣ is a slam try and shows 2 good suits
You also play a 12-14 NT. The rebid of 1♠ does not deny a balanced 15-17, but it does deny a balanced 18-19.
Your call?

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