Versus 2S which shows the minors

Rating: 2 boards per segment/round

Double = Balanced 13-15 or 19+.
2NT = Balanced 16-18. Respond as to 2NT opening.
3C = Majors only 5-4 (3D asks for five-card suit).
3D = Majors 5+ - 5+, (4C = heart slam try, 4D = spade slam try).

3M = Natural (4C response = cuebid).

After: 2S - Double - 3 or 4 of a minor:
Double = Responsive.
Majors = Natural, non-forcing.
Minors = Cuebid.

After: 2S - Pass - 2NT:
Double = 14+ balanced or strong unbalanced.
3-level bids = As over 2S directly.
2S - Pass - 3 or 4 of a minor:
Double = Takeout.