[Phil]

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You catch a nice dummy for your aggressive 4♠ call (its matchpoints). LHO leads out the ♦AK. RHO does not peter, and LHO shifts to the ♠2. No matter where you win this, RHO plays the 8.

10 tricks are easy with 3-2 splits in the black suits. Can you give yourself a chance against a less favorable breaks?

[Fluffy]

I think best start is ♠Q, ♣A then ♣ to the king. LHO has more diamonds so he has less clubs on average and I want to protect him from being singleton.

[bluecalm]

Quote

LHO has more diamonds so he has less clubs on average and I want to protect him from being singleton.

I think it's much more likely that RHO has stiff club.
First LHO would almost often lead or switch to his stiff club because on many layout he is only looking at 9-12pc and can well think partner has one of the black aces for quick set.
The reason for him not leading stiff club could be also that it's stiff honour. In that case we will be able to use our 9 to hook RHO's HH.
I am starting with K♣ and if H doesn't fall on the left I am playing club to the ace. If RHO shows out I am ruffing diamond, drawing 3 round of trumps and exiting with my last club endplaying him either to lead into my AQ♥ or to set up club suit.
If H falls on the left to K♣ I will take 3 round of trumps ending in dummy and hook the club.

[kenrexford]

I agree that RHO is more likely to have the stiff club, because with many hands (like 4-3-5-1 shape), LHO would have started with a takeout double rather than 1D.

[gnasher]

Didn't partner notice that he had a nice dummy for you?

It seems awkward to cope with either 4-1 club break, unless we take a heart finesse. For example, if we win in dummy, play ♣K, ♣A (RHO discarding a diamond), club, LHO plays another trump and we're in a mess.

We can cater for spades 4-1: win in dummy, duck a club, win the return, ruff a red card if necessary, and draw trumps. I'd do that.

No doubt I'll wake up tomorrow and find that Rainer has posted a line that caters for everything.