Scoring: XIMP
Partner opens 1♦, you respond 2♣ game forcing, and partner bids 2NT.
Unfortunately, your system here is rather lacking. You have the following knowledge: at these colors, 1NT is 10-12. (edited: If partner is balacned, he is 13-15, stonger balanced hands always open 1♣/2 level bids).
You have agreed that partner would have rebid 2♦ if and only if he has five or more diamonds. That is the extent of your discussion on 1♦-2♣ auctions.
What is your call/plan?

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