Bidding: S opens 1♥, W overcalls 4♠, N passes after a long pause (Clear BIT, even considering the pre-empt, and accepted by both teams).
N-S vulnerable.
For the purpose of my questions, consider the following assumptions to hold:
A. In the absence of UI, 5♣ is the most common / obvious rebid by S. ~80-90% of the field bid 5♣ after the 4♠ preempt.
B. Pass by S is a LA, ~10-20% of the field passed after 4♠
(The holding is only illustrative - Feel free to assume a different hand if you believe these assumptions are not valid on this one)
Now as I understand it, the UI indicates a desire to bid by N, and hence to avoid acting on the UI, S should pass. Questions relate to the following 2 scenarios:
Situation 1: N has decent hearts & K♣. In this hand S passes because the UI; however, 4S is down 2. ~80-90% of the field ends up in 5H, which goes down 1 (Losing top 2 spades and 1 D). So NS here end up benefiting from the UI, since S would have bid on but passed only to avoid acting on the UI. Can EW claim any score adjustment?
Situation 2: N has 4 small ♠ and 0 HCP. He knew S is an aggressive bidder, and wanted to discourage a 5 level bid which he felt could not make. So he deliberately took a long pause, correctly predicting that S would have to pass given the UI. Again, ~80-90% of the field ends up in 5♥ which is down 2 / down 3, worse than 4S making. So NS here end up benefiting from the UI, though in this case it was deliberate by N. Can EW claim any score adjustment here?
Thanks in advance!