NORTH
 A86
 43
 Q732
 AJ42
 K92
 K96
 KJT865
 8
  JT7543
 T2
 94
 753
  Q
 AQJ875
 A
 KQT96
Dealer: South    Vul: EW   MP Scoring

West

2
Pass
Pass
Pass

North

2N1
4
52
Pass

East

Pass
Pass
Pass
Pass

South
1
4
4N
6

 Matchpoint Slam 
1 11 balanced with a diamond stopper
2 2 Keycards in Clubs, the last bid suit

North, with such fine club support opposite a distributional hand interested in slam opposite a balanced 11 points, revalued for the two aces, heart ruffing value and fine trump support.
North's encouraging 4 'cuebid' might have best been forgone in favour of 6 directly, for lack of diamond control and an unavoidable 6 anyway.

A diamond was led, trump drawn, and South started with the A trying to catch the already daring West 2 bidder (unfavourable vulnerability) with a singleton K.