Scoring: MP
(1NT)-Pass-(2NT!)-Pass
(3D)-Pass-(Pass)-3H
(4D)-??
You play MP's. RHO opens 1NT 15-17.
You play multi Landy and could have bid 2C for the majors, but -Vulnerable- you are not strong enough for this.
LHO bids 2NT, transfer to Diamonds and RHO bids 3D (This is not alerted but you know that 3C would have shown an accept of a diamond invite).
Partner balances with 3H and RHO bids 4D (not sure if his 3D bid was wrong and should have been 3C or if he is overbidding now).
What do you bid? (Would it be different at other vulnerability?)
Thanks,
Koen

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