The responses 1♦-1♥♠ show 4+ cards just like most natural systems. Responder
has 8+ points most of the time.
1♦-1♥ | 4+♥ |
1♠ | 4+♠ |
1NT | BAL MIN, 4–5♦ |
2♣ | MIN, 4+♣ |
2♦ | MIN, 6+♦ |
2♥ | MIN, 4+♥ |
2♠! | MAX, 6+♦, ♦AJT+ or 7+♦ |
2NT! | MAX, 6=♦, ≤ ♦AJ9 |
3♣ | MAX, 5+♣ |
3♦! | MAX, 6+♦, 3=♥ |
3♥ | MAX, 4+♥, 5+♦ |
1♦-1♠ | 4+♠ |
1NT | BAL MIN, 4–5♦ |
2♣ | UNBAL, 3+♣ |
2♦ | MIN, 6+♦ |
2♥ | 4+♥, 5+♦, MAX or 3451 |
2♠ | MIN, 4+♠ |
2NT! | MAX, 6+♦, 0–2♠ |
3♣ | MAX, 5+♣ |
3♦! | MAX, 6+♦, 3=♠ |
3♠ | MAX, 4+♠, 5+♦ |
We use BTU-style 3-way checkback to an XYZ auction. There are 3 artificial
relays in the 3-way checkback:
- 2♣: several variants:
- to play 2X
- strongly shaped invitation
- balanced invitation or choice of games
- 2♦: game-forcing checkback, usually a choice of games
- 2NT: transfer to clubs
As a corollary, natural 2X are wide-range invitations and 3X become slam tries.
1♦-1♥ 1♠- | 4+♠ |
1NT | MIN, 0–3♠, 4–5♥, 0–3♦ |
2♣! | BTU CB, F1 |
2♦! | FG CB |
2♥ | INV, 5+♥ |
2♠ | INV, 4+♠ |
2NT! | TRF, PRE or FG, 6+♣ |
3♣ | S/T, 5+♣, 5+♥ |
3♦ | S/T, 4+♦, 5+♥ |
3♥ | S/T, 6+♥ |
3♠ | S/T, 4+♠ |
1♦-1♥ 1♠-1NT | NAT MIN |
2♣ | NF, 4=♣ |
2♦ | NF, 6+♦ |
2♥ | INV, 3=♥ |
2♠ | INV, 5+♠, 6+♦ |
2NT | NAT INV |
3♣ | FG, 4=♣ |
3♦ | FG, 6+♦ |
3♥ | FG, 3=♥ |
1♦-1♥ 1♠-2♣ | BTU CB |
2♦ | MIN |
2♥ | MAX, 3=♥ |
2♠ | MAX, at most partial stop in ♣ |
2NT | MAX, likely stop in ♣ |
3♣ | MAX, 4054 |
3♦ | MAX, 6+♦ |
1♦-1♥ 1♠-2♣ 2♦- | MIN |
2♥ | S/O, UNBAL 5+♥ |
2♠ | S/O, 4+♠ |
2NT | BAL INV |
3♣ | INV, 6+♣ |
3♦ | INV, 4+♦ |
3♥ | INV, S-SOL 6+♥ |
3♠ | INV, 4+♠, 5+♥ |
1♦-1♥ 1NT- | BAL MIN |
2♣! | BTU CB, F1 |
2♣ 2♦ | P/C |
2♣ 2♥ | MAX, 3=♥ |
2♦! | FG CB |
2♥ | INV, 5+♥ |
2♠ | INV, 4+♠ |
2NT! | TRF, PRE or FG, 6+♣ |
3♣ | S/T, 5+♣, 5+♥ |
3♦ | S/T, 4+♦, 5+♥ |
3♥ | S/T, 6+♥ |
3♠! | SPL, 0–1♠, 6+♥ |
4♣! | SPL, 0–1♣, 6+♥ |
4♦ | FG, 4+♦, 6+♥ |
1♦-1♥ 1NT-2♣ 2♦- | P/C |
2♥ | S/O, 5+♥ |
2♠ | INV, 4+♠, 6+♥ |
2NT | BAL INV |
3♣ | INV, 6+♣ |
3♦ | INV, 4+♦ |
3♥ | INV, S-SOL 6+♥ |
1♦-1♠ 1NT- | BAL MIN |
2♣! | BTU CB, F1 |
2♣ 2♦ | P/C |
2♣ 2♥ | MAX, 4+♥ |
2♣ 2♠ | MAX, 3=♠ |
2♦! | FG CB |
2♥ | INV, 4+♥, 5+♠ |
2♠ | INV, 5+♠ |
2NT | TRF, PRE or FG, 6+♣ |
3♣ | S/T, 5+♣, 5+♠ |
3♦ | S/T, 5+♦, 5+♠ |
3♥ | S/T, 5+♥, 5+♠ |
3♠ | S/T, 6+♠ |
3NT | 12–15, 4=♠ |
4♣! | SPL, 0–1♣, 6+♠ |
4♦ | FG, 4+♦, 6+♠ |
4♥! | SPL, 0–1♥, 6+♠ |
1♦-1♠ 1NT-2♣ 2♦- | P/C |
2♥ | MIN, 4+♥, 5+♠ |
2♠ | S/O, 5+♠ |
2NT | BAL INV |
3♣ | INV, 6+♣ |
3♦ | INV, 6+♦ |
3♥ | INV, 5+♥, 5+♠ |
3♠ | INV, S-SOL 6+♠ |
For a precise game try, we sacrifice 2NT as Lebensohl to park minimum hands.
1♦-1♠ 2♥- | 4+♥, 5+♦, MAX or 3451 |
2♠ | NF, 5+♠ |
2NT! | LEB, non-FG |
3♣! | 4SFG |
3♦ | FG, 3+♦ |
3♥ | FG, 4+♥ |
3♠ | FG, 6+♠ |