[Echognome]

Scoring: IMP

P - (1NT)* - 2♦** - (P)
2♠ - (P) - 3♠ - (P)
4♠ - All Pass

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*13-15
**Spades and another

You end up in 4♠ and West leads the A and K of hearts, East playing the 7 and the 2. West shifts to the ♣4 and dummy's K is taken by East's A. East then shifts to the ♣3. You play a low club, West plays the 10 and you ruff in dummy. You lead a low trump from dummy and East shows out!

Plan the play from here.

Note that although the hand is close to double dummy, it is quite difficult.

[arrows]

I couldn't find any other way but playing west having:

♠ Q842
♥ AKJ
♦ Kxx
♣ QT4

so win the king, take a diamond finesse, diamond A and diamond ruff low,
now spade 10, west has to cover, win Ace ruff another diamond, and
west gets squeezed on this trick... I can then continue with a winner in the
suit that west discards and finish the trump coup.

[civill]

I agree to Arrows' hand evaluation.

[Fluffy]

didn't find it