JoostJa online bridge

♠ A 8 6 4
♥ K 4
♦ 6 4
♣ A J 10 9 5


South is the dealer and East-West are vulnerable
WESTNORTHEASTSOUTH

Pass
1 ♣ Pass 1 ♥ Pass
1 ♠ Pass 2NT Pass
???

My bid was Pass but a 3 ♣ bid will be better most of the time.   A 1NT opening would have worked well too here, if East passes with the 4333 and 11 HCP.  

East had ♠K72 ♥QJ102 ♦1093 ♣KQ3, so 3NT is in danger if they take their diamond tricks and the ace of hearts.  

I entered this hand in my new Jack 4.0 to see what happens with 4 Jack players.   It bid 3NT over 2NT in the problem situation, and made 10 tricks.   Sometimes bridge is just like poker.