[flytoox]

Playing 2/1, sitting south I am declaring this 4H. 2H promises 4 cards support, so I bid 4H directly. (Should we bid 3N along the way to let pd decides what to play? IN this case I guess pd will correct to 4H anyway)

Opening lead is C4, East took club ace and returned a small club, all follows. Opponents lead small from three small cards.

What is the best line?

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[Fluffy]

If diamond ace is offside I think we are down unless they are 3-3.

If confident enough that clubs are 3-4 best line is ♠A, ♣K pitching spade and a diamond up, however if RHO ruffs ♣K we are in heavy trouble.

getting in with ♥K gives up ♥Jxxx onside, but that is rare because then LHO with 3 clubs and 1 heart didn't bid at the 1 level, if that's because he has only 4 spades and 5 diamonds everything is breaking very badly and we won't likelly make it.

So start with ♥K and a diamond up is my line.

[jschafer]

I don't have anything to add to the play but generally I would only suggest 3NT with a known 8-card major fit on a 4333 shape. Maybe also 4432 but only when I have mostly quacks.

[rhm]

At trick 3 I would play a low ♦ from the table.
This might not be the best way to play the hand double dummy.
But Bridge is not played double dummy.

Rainer Herrmann