Unusual 2NT Examples

Board 7
South Deals
Both Vul
♠A 10 9 4
♥3
♦Q J 7 5
♣A 9 5 3
♠K Q J 8 6
♥A 6 5 4 2
♦8
♣8 4
N
WE
S
♠7 5 3 2
♥10 8 7
♦K 9 6 4
♣K 2
♠—
♥K Q J 9
♦A 10 3 2
♣Q J 10 7 6
WestNorthEastSouth
   1♣1
2NT!23♠4♥Dbl
All pass   
  1. South will bid1♣
  2. And West will come in with 2NT. Can N/S find game?

4♥× by East