This is interesting for me. I was in the seat shown and caught hell (sort of -- mostly friendly discussion) for my decision at the table. I'll hold off on this for a second. But, a few observations are in order.
First, Declarer is a relatively good player (ACBL A Flight, frequent contender), but he is capable of bizarre play (like all of us).
Second, does not the situation call for count in spades at your first discard? Isn't a positive attitude somewhat implied anyway, or less relevant? If partner knows you have an even number of spades, might he not switch to spades after winning the heart when a spade can be cashed, giving count? This would allow you to switch to the second club. But, what if partner has five spades?
Third, is it all that automatic to lead back a club at trick two, or even at trick four, when partner holds two clubs? If clubs are as they appear to partner from my lead, namely 5332, then a club back yields a heart to partner's Ace and a switch problem. Guess wrong, or give Opener both Aces, and the club suit comes in anyway, without us setting up our spades in time.
My thought was that partner would not lead back a club with Qx at trick two for the reasons stated above. With three clubs, he would not lead back a club now unless we have exhausted our spade-taking ability. He may be concerned with five spades that we are done now, especially after the club play by Declarer. So, partner rates to have five spades, giving Declarer one and 1543/1552/1642 pattern.
Partner would typically lead a second club now, unless it was pointless, when spades are exhausted and he has three clubs. With two clubs and five spades, he may need to attack diamonds. This leans me toward 1543 for Opener. However, with that holding, Declarer will ditch two diamonds at the end, so my defense is relatively meaningless. If I cash two diamonds, if I lead back a club, if I try to cash a second spade -- all roads lead to Rome.
What if, however, Declarer was 1552? Would he take the hook?
Maybe. Perhaps he gambled (seeing the lead himself) on clubs splitting 3-3 and poor defense (allowing clubs to come in for him), or maybe he simply expects that the transportation issues will make diamond establishment very difficult, such that a third club trick is an extra trick. With that layout, I can cash a second diamond and then give partner a diamond ruff. We hold them to eight tricks. Anything else allows nine tricks.
Is this crazy thought, plausible, a good analysis, or other?
"Gibberish in, gibberish out. A trial judge, three sets of lawyers, and now three appellate judges cannot agree on what this law means. And we ask police officers, prosecutors, defense lawyers, and citizens to enforce or abide by it? The legislature continues to write unreadable statutes. Gibberish should not be enforced as law."
-P.J. Painter.