Power 1NT : Deal 22
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Dealer is W     None Vulnerable
West *
♠ K J 10 2
♥ Q J 6 5
♦ A 5
♣ A K 2
Next
East
♠ A 9
♥ A K 10 8 4 3 2
♦ Q J 10
♣ 4
 
W N E S
1NT - 3♥# -
3NT* - 4♦** -
4NT* - 5♣## -
6♥ - Pass -
 
# = 6+card ♥ suit (no transfer !)     * = RKC Blackwood
** = 0 or 3 keycards
## = no other King → do not show the trump King again !

Afte a 1NT Opening an immediate 3-level Response establishes the trump suit.   Therefore :
      a new suit can be a Multi cue
      3NT or 4NT can be used as RKC or simple Blackwood.