Unusual right-siding problem -- Solution

This deal was solved in comments fairly quickly. West to lead and defeat 5N. 5N with East on lead cannot be defeated:

		♠	Q 3
		♥	K Q J 6 4 2
		♦	A 7 6
		♣	A 8
♠	K 9 5			♠	J 10 8 7 2
♥	8 7 5			♥	A 9 3
♦	K 10 3 2			♦	9 8 4
♣	J 6 3			♣	Q 9
		♠	A 6 4
		♥	10
		♦	Q J 5
		♣	K 10 7 5 4 2

The only positional possibility is in the club suit, so West must need to lead a club. The interesting variants are, after declarer wins ♣A:

1. Declarer attacks hearts. East wins and plays a spade. If declarer ducks, he has 11 tricks set up, but West can tangle his entries by leading a 2nd club -- this would not be possible if East had opening led the ♣Q as South would have a tenace. If declarer wins and plays ♦Q, West had better cover or declarer wins, takes ♦A and all the hearts and has a (non-repeating) triple squeeze for his 11th trick -- in the 3 card ending West must hold ♠K, ♦K, and the guarded ♣J. If West does cover, then in the 4 card ending he can only hold 1 diamond which can be stripped with ♦J, then a spade exit would force a club lead away from the J. Again, it is critical that the opening lead have been from West so that East's ♣Q guard against an endplay.

2. Declarer wins and plays 3 rounds of clubs. Now West must play the ♦K to kill the heart suit. A bit unusually, South could prevent the hearts from being killed by ducking, except that then ♣J, ♦K, and ♥A are 3 tricks for the defense.

A nice collection of communication disrupting plays.