NORTH
 K964
 972
 T7
 AK97
 J5
 643
 A942
 Q832
  Q8
 AKJ5
 KQ53
 JT4
  AT732
 QT8
 J86
 65
Dealer: South    Vul: NS   MP Scoring

West

Pass
Pass
2
Pass

North

1
Pass1
22
Pass

East

X
Pass
Pass
Pass

South
Pass
1
Pass
3

 Ambition Rewarded 
1 sub minimum
2 four spades (pass would have shown three)

Perhaps North's light 3rd seat opener is to be excused for the lead directing benefit, even falling short of the "casino count" of 15 (spades plus points=only 14 here).

South apprised of nine spades competed on the basis of the Law of Total Tricks, despite the vulnerability.
Heart honours were right and there were 5 spades, 1 heart, 2 clubs and 1 diamond ruff.