Mohan convention

• Double shows 14+ points, and is often left in for penalty. If it is not, the advancer bids as though his partner had opened 1NT..
• 2 shows both majors, possibly 5-4. If responder does not have a preference, he bids 2 to let opener pick.
• 2 is a transfer to hearts,
• 2 is a transfer to spades,
• 2 shows spades and a minor,
• 2NT shows hearts and a minor,
• 3 of a minor shows a long minor and is constructive,
• 3 of a major is pre-emptive.