Unusual 2NT Examples

Board 6
East Deals
E-W Vul
10 7 6 4 2
K Q 10 3 2
A 5
K
Q J 3
8 5 4
Q J 10 7 2
A 9
N
WE
S
K 8 5
A 6
K 6
Q J 10 7 4 2
A 9
J 9 7
9 8 4 3
8 6 5 3

WestNorthEastSouth
  11Pass
122NT!333
All pass4   
  1. East will open 1
  2. West will bid 1
  3. North will bid 2NT for the majors
  4. A double would do just as well in this situation, but the bid of 2NT takes out bidding space.
3 by South