6+ Cards with 6-9 HCP could be weaker with interference
2/1 System
System Summary
Openings
1♣ - 12-21, could be as short as 2 clubs
1♦ - 12-21, Promises 4+ Diamonds
1♥ - 12-21 5 card ♥ and < 5 spades
1♠ - 12-21 5 card ♠ and < 5 hearts
1NT - 1st & 2nd Seat - 12 -14 HCP / 3rd & 4th Seat - 15-17 HCP
2♣ - Strong Hand (22+ HCP or <=4LTC)
2♦ - 5-5 Majors 10+ HCP
2♥ - Weak 6+ hearts
2♠ - Weak 6+ spades
2NT - Strong (20-21 HCP)
3NT - 5-5 in the Minors 10+ HCP
4♣ - Namyats
4♦ - Namyats
Other Openings
Overcall
1NT Overcall
1NT Opponents Opening
Opponents bid 2 Suits
Suit Bid Over Opponent Opening
Doubles
Conventions
Two-Way Drury
XYZ or XY-NT
Bergen Raises
OGUST
Woosley
Lebensohl
Criss-Cross Inverted Minor
Constructive Jump Shift
KickBack RKC
Defense
Convention Card