At the table, I took the "legitimate" line of ruffing the second diamond, playing the small heart to the ace, and letting a spade ride. LHO took the king and returned a trump; I drew trumps and was forced to concede two club tricks (the heart suit is blocked) for one down. This was worth 4 matchpoints on a 12 top.
It's possible that ducking a spade at trick two or playing ace and a spade might be a better play. This gives a chance to make if LHO returns spade or diamond. Of course, the heart hook is off, so people planning to do that could easily go down two (for 0 matchpoints on a 12 top).
It's true that 3NT can be made on the opposing cards (well on a non-heart lead), but no one was bidding it. Of course 3
♦ will make (likely with an overtrick if hearts aren't lead early) and this is why the 4/12 matchpoints.
Anyways, I was wondering if this hand would have been a good time to give up on legitimate chances of making and try for a misdefense. It does seem like RHO must have AQ of diamonds, so if we place him with a club honor it's reasonable to give up on the spade hook. Then again, I'm not convinced that LHO would automatically lead a club from AK rather than the partnership suit. Seemed like an interesting non-technical play problem.
Adam W. Meyerson
a.k.a. Appeal Without Merit