- 2¨               : preference
                      - 2ª                : preference
                      - 2NT              : invitation, can be five spades
                      - 3§               : invitation, at least four clubs

                                     if opener bid more; turning to 4§, shows very unbalanced weak hand
                      - 3¨               : invitation with four cards or Hxx
                      - 3©               : invitation with (5-5)
                        opener’s 3ª return shows bad hand with two or three trumps and sign-off
                      - 3ª                : Invitation with good six spades
                      - 3NT              : to play
                      - 4§               : RKCB for clubs
                      - 4¨               : RKCB for diamonds

4^th suit relay

1¨   -             1ª
2§   -             2©                  game-forcing relay
 ?

- 2ª                : first step shows maximum opening, any distribution
- 2NT              : (2-2-5-4) minimum with heart stopper
- 3§                : (5-5) minimum
- 3¨               : (2-2-5-4) minimum, no heart stopper
               (with six diamonds, four clubs and minimum hand, rebid 2¨ first)
- 3©                : (0-4-5-4) minimum
- 3ª                : (3-1-5-4) minimum
- 3NT              : (1-3-5-4) minimum

Rules

- Against two level relay, shows long (three-four cards) major
- After some bids, against three level relay, shows short major.
- If opener shows (5-5) minors, 3¨ ask shortness; then 4minor, fixes trump and ask RKCB
- If opener shows (0-4-5-4); 4 NT is RKCB for hearts

1¨   -             1ª
2§   -             2©
3§   -             3¨                 relay, asks short major
 ?

- 3©                : short heart
- 3ª                : short spade no heart honor
- 3NT              : short spade and honor in hearts

1¨   -             1ª
2§   -             2©
2ª   -             2NT                relay, asks distribution
 ?

- 3§               : (5-5), now 3¨ also asking
- 3¨               : (6-4), now 3© ask distribution
- 3©                : (0-4-5-4)

- 3ª                : (3-1-5-4)
- 3NT              : (1-3-5-4) or (2-2-5-4)

1¨   -             1ª
2§   -             2©
2ª   -             2NT
3¨   -             3©                  relay, asks short major
 ?

- 3ª                : short spade
- 3NT              : short heart

- 4ª                : (3-0-6-4)

1¨   -             1©
2§   -             2ª                  game-forcing relay
 ?

- 2NT              : maximum opening, any distribution
- 3§                : (5-5) minimum
- 3¨               : (2-2-5-4) minimum, no spade stopper
- 3©                : (1-3-5-4) minimum
- 3ª                : (3-1-5-4) minimum
- 3NT              : (2-2-5-4) minimum with spade stopper

1¨   -             1©
2§   -             2ª
2NT -             3§                  relay, asks distribution
 ?

- 3¨               : (6/4), now 3©ask short major
- 3©                : (2-1-5-5)
- 3ª                : (1-2-5-5)
- 3NT              : (2-2-5-4) or (3-1-5-4)
- 4©                : (1-3-5-4)