Unusual 2NT Examples

Board 4
West Deals
Both Vul
♠A K Q 7 6 5
♥A 8 7 6 5
♦10
♣8
♠3 2
♥K J 9
♦K Q J 5
♣K Q 4 3
N
WE
S
♠8 4
♥3 2
♦A 9 4 2
♣A J 9 6 5
♠J 10 9
♥Q 10 4
♦8 7 6 3
♣10 7 2
WestNorthEastSouth
1♣12NT!23♣3♥3
4♣4♠PassPass
Pass   
  1. West will open 1♣ or 1♦.
  2. North will go 2NT for the majors.
  3. Only part scores available for either side. Who will win the fight?
4♠ by North