BRIDGE BIDDING QUIZ SOLUTION
Partner’s raise to 3D does not promise any more than a minimum; it is his duty to raise you with diamond support. Unless you play a two-level response as forcing to game (the system known as ‘2-over-1’), a bid of 3S is not forcing now. You do best to bid 4S. You have a queen or so to spare for this bid, yes, but that is not a sin.
Awards: 4S – 10, 3H – 6, 3NT – 4, 3S – 3.