In my last post I posed this problem
Partner's bid appears to be irrational.
Since normal thought is not going to help, lets try the alternate style of crossing out alternatives.
Option 1: Partner has a weak hand with long clubs. Say QJ to eight clubs and out. That would be a comfortable natural, non-forcing 2C bid. Passing an eight card suit and giving up on an opportunity to bid cheaply does not seem to fit in with our bid-early-bid-quick style.
Points, Schmoints. In competitive auctions, shape rules.
So let us strike out a weak hand with long clubs
Option 2 : Partner has bit of a spade fit and some club values and is exploring for game. Again, making ambiguous wishy-washy bids is not our style. Although we have never explicitly discussed it, we go out of our way to avoid bids that partner may not understand. Partner is our friend, do not torture him.
Martin Reid mentioned the prototypical Qx,xxx,xxx,AKxxx hand for this theory but for us, this would be a 4S bid (bidding 1S and 2S shows a good hand) or 3S on a conservative day.
While there are still some lingering doubts in my mind about long-weak-clubs theory, we can certainly strike out this delicate game-try theory.
Option 3 : Is there an option three ?
Nothing else seems to be possibly going on. Or could it ?
If you have a genuine interest in getting to the heart of this problem, I would recommend stopping here and try thinking about a third option.
I recall reading something in a book or a magazine about what were believed to be bidding principles over 50 years ago. These were common sense beliefs in the expert community, some of which continue to be relevant today and some do not.
For example, partner passes as dealer, RHO opens 1H, we pass, LHO bids 4H, partner comes back in with 4S. Today, in our developed(?) style of bidding, we do not have a clue what partner has. Back then, this sequence clearly showed a weak two-suiter. Say 6 spades and a 5 card minor.
Another such principle was "Passing over 1NT and then coming back into the auction shows a solid suit". There isn't much point to bidding seven solid diamonds over a strong NT. Why not try a pass for now, hoping to go plus against 1NT or 3NT, but if the opponents seem to be heading into a suit contract, then we can always re-enter with 3D. Or so the thought of the time went.....
If we seriously consider this option, the rest of the hand falls perfectly into place. The opponents were in a vulnerable 1NT, a penalty double was not available, the points add up, there rates to be a spade misfit.
So the only thing which makes sense is approximately seven solid clubs and out.
Ergo, a confident 3NT and a prompt redouble.
Or perhaps a classic case of hindsight bias ?