[FrancesHinden]

For most of the play I was going to make this, I was all set to take the winning line, and then... suddenly (but slowly)... I went off.

32 board KO IMPs match against opponents who are usually pretty solid (they do well in national events) but not real experts.

Scoring: IMP

1♦ 2♣ 2♠ P
3♠ P 4♠ all pass

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LHO leads the queen of clubs to RHO's ace.
RHO thinks for a while, then cashes the ace of hearts (you won't get a helpful signal on your left on this), and switches to the 7 of spades, 8, Jack, King.

You have a sneaking suspicion that whatever RHO's hand is, cashing the ace of hearts was wrong. But does that help you deduce what his hand is?

Plan the rest of the play.

[Rebound]

The first thing I would do is lead the ♦ Q and throw a club on it.

[mike777]

edit

[Al_U_Card]

Seems he might be x,Axx,Kxx,AJxxxx for his bid.

[FrancesHinden]

By the way, opponents do not play weak jump overcalls, they play intermediate (opening values, 6-card suit). So RHO hasn't got that.

[PMetsch]

I would draw another round of trumps with the queen. If spades break, then a club to the king and a club ruff (even if LHO ruffs the 3rd club I can always ruff a heart later).

If LHO shows out on the second spade, then I play RHO for:

♠Txxx
♥Axx
♦-
♣AJxxxx

taking the spade finesse, draw trumps, cash the ♣K and throw LHO in with the 4th♥ to put me back in the dummy with a diamond (discard ♣).

If RHO shows out on the second spade, then I play RHO for:

♠7
♥Axx
♦Kxx
♣AJxxxx

to be able to discard my ♥ and ♣loosers on the diamonds. So ♦A (discarding ♥), ♦Q (ruffed if covered). ♥KQ and a ♥ruff, ♦J (discarding ♣), ♣K and then trumps.

[Fluffy]

Need the trumps 3-2, I cannot see any line that wins if they aren't except J109 of ♥. So Maybe running the ♦Q is what I would ahd done. Also maybe I would had called director because of the ♥8 duplication.