Bocchi-Duboin 2006

1§-1NT=15-18HcP,bal

We:non-Vulnerable

Pass=Trans -> DBL

*5-4 MAJORS

*5¨ + 4cd MAJOR

Pass-DBL-2§=5-4 MAJORS

Pass-DBL-2¨=5¨ + MAJOR

DBL=Penalty

2§=5§ + 4cd MAJOR

2¨=*6© or 6ª

*Strong 2-suit,M+m

2©=5+© + 4+minor

2ª=5+ª + 4+minor

2NT=§ + ¨

3§¨©ª=Preempt

We:Vulnerable

DBL=13+HcP,Takeout

2§=4+© + 4+ª

2¨=*6© or 6ª

*Strong 2-suit,M+m

2©=5+© + 4+minor

2ª=5+ª + 4+minor

2NT=§ + ¨

3§¨©ª=Preempt