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3NT Blackwood

• 3NT Blackwood
•  
• 4§=No Ace
•   Suit=ASK Controls
•     #Resp.normal suit
•     #Resp.unknown suit
•     #Resp.long suit
• 4¨=1 Ace
•   4NT=Which ace?
•     5§¨©ª=Ace
•   Suit=ASK Controls
•     #Resp.normal suit
•     #Resp.unknown suit
•     #Resp.long suit
• 4©=2 Aces
•   4NT=Which aces?
•     5§=§+¨
•     5¨=©+ª
•     5©=ª+¨ OR ©+§
•     5ª=ª+§ OR ©+¨
•   Suit=ASK Controls
•     #Resp.normal suit
•     #Resp.unknown suit
•     #Resp.long suit
• 4ª=3 Aces
•   4NT=Which ace?
•     5§¨©ª=Missing
•   Suit=ASK Controls
•     #Resp.normal suit
•     #Resp.unknown suit
•     #Resp.long suit

• This asking can be used by opener and responder as well

• 3NT is used when an unnecessary JUMP to 3NT is made knowing the player doing so cannot be balanced. If balanced 2NT is bid - a forcing bid

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