East will pass

South will open 1♦ 

West will pass

North will bid 1♥ 

East will pass

South has a difficult decision

• Bidding 1♠ being probably best (this is not a reverse)
• Reversing  with 2♠ (a bit weak, but with 3 aces)
• Rebidding ♦ s risks being passed out by hands that could make game.
• Bidding 2NT

Bridge is a difficult game!!

Over 1♠ North will correct to 2♦ which South may invite with 3♦ which will be passed out and go one off.

2NT will go off when West leads a ♣ 

North and East will pass.

South has a 1NT balanced 12-14 HCP bid.

West will consider bidding, especially if they have a conventional bid e.g. Landy convention where a 2♣ bid shows the majors (normaly 5+/4+ and 10+HCPs)

Being vulnerable may put people off, but this is a strong 11HCP hand (Kaplan evaluator shows it as 13.05HCps, so compete).

North has nothing to say.

East will probably bid 2♥ s which will be passed out.

Though N/S 19HCPs and 8♠ s they would go 2 off with the bas split.

E/W could make 10 tricks in ♥ s as the ♠ singleton is useful which East cannot expect as West had shown ♠ s