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Defensive Lead-signal-discardOffensive 1C, various featuresOffensive - balanced handsOffensive - 1-2 seatOffensive - 3-4 seat

 

Bocchi-Duboin

 

2¨-DBL=Values

2¨-DBL-Pass-2NT=#ASK

2¨-DBL-2©-2NT=#ASK

2¨-DBL-2ª-2NT=#ASK