You are in a nationally rated event, and choose to describe this hand as an intermediate 2 bid (9-14 HCP, 6+ hearts). During the bidding, you show your singleton diamond. Partner then tanks 4 minutes before bidding 3N.
Partner does not promise a heart fit, his 2N was a generic game force asking you to describe your hand further. He also had ogust available, and a game forcing spade hand, as well as a light invitation guarenteeing a fit.
What do you do? Is your action influenced by the tank?
Benefits include:
Plus... it's free!