Opening lead ♣2 to the A, switch to the AK♦, which gives S a chance to cash 2 ♥ and ruff a third on the board, ruff a diamond high, pull trump, lose a heart and a spade for -2 and -500.
The N/S actual agreement was that 2♣ was Michaels over natural openings, but natural over strong clubs.
Q1: Were E/W damaged by the MI?
Q2: Was pass of 4♠X a LA and was the 5♣ call a LA suggested by the UI?
Q3: If 5♣ was suggested by the UI was the E/W failure to continue ♣ trick 2 and collect 800 enough of a serious error or wild and gambling action and such that they shouldn't get a correction?
Q4: If you rule that N/S play 4♠X, how many tricks do you give them?
How do you rule?
1♣*-2♣**-P-4♠
X-5♣-X-P
P-P
* - alerted and explained as forcing artificial 16+ (18+ if bal)
** - not alerted, but explained when West asked at his first turn as Michaels showing 55 in the majors