2D showed a single-suited major or strong 5+/5+
2H was natural but explained as a transfer on NE side of screen
3H was a cue bid showing good spades on SW side of screen
The remaining calls were accompanied by much thought: bids to play, doubles for penalties
South lead ♥J, won in dummy.
Club finesse lost to South
South cashed ♠K: 3, 10, 5
Now a small spade is -2, anything but a diamond is -1.
But South switched to ♦J and the contract made.
The different explanations of 2♥ on either side of the screen came to light and NS asked for a ruling. NS seemed to be arguing they would defeat 4♣X but they might also have argued that auction would be different.
The result in the other room was 4♠-1 and the ruling was NS +3IMP (which looks like a Law 12C1d ruling).
Any more information or comment?
W .. N .. E .. S
. . . . . . 1NT . 2D
2H . P . 2S .. 3H
X . . P . 3NT . P
P . . X . 4C . . X
P . . P . P