2/2 opening showing 5 - 10 HCP and 5 card in the opening suit and a side suit in minor. You can decide if you use 4+ or 5 in the minor suit. 5-5 is more safe, but 5-4 is more frequently.
- 2NT : Ask for sidesuit. After 3 /3, 3 in the opening suit is invitational.
- New suit : Not forcing.
- 3 in opening suit : Pre-empt.