| Not vulnerable | Not vulnerable | Vulnerable | Vulnerable |
| Openings | Responses | Openings | Responses |
| Pass = 13+ | 1♣ = 0-6 any 1♦ = 11+ shape ask 1♥ = 4+♠, 7-10 pts 1♠ = 4+♥, 7-10 pts 1N+ = natural, 7-10 | LEADS 3rds & 5ths Honour leads = 0 or 2 higher | SIGNALS Reverse attitude Reverse count Smith Peters |
| 1♣ = 4+♥ could be canapé 7-12 pts | 1♦ = 13-15 any (or some weaker hands) 1♥ = 16+ shape ask Others not forcing | 1♣ = 16+ any | 1♦ = 0-7 others 8+ artificial |
| 1♦ = 4+♠, not 4♥ could be canapé 7-12 pts | 1♥ = 13-15 any (or some weaker hands) 1♠ = 16+ shape ask Others not forcing | 1♦ = 4+♠ not 4♥ 10-14 pts | 1♥ = 10-12 any (or some weaker hands) 1♠ = 13+ shape ask 1NT = 6-10 balanced (may have 4+♥) Others not forcing |
| 1♥ = 7-12 bal no 4cM | 1♠ = 13+ strength / shape ask Others not forcing | 1♥ = 4+♥ not 4♠ could be canapé 11-15 pts | 1♠ = 11+ shape ask 1NT = 6-10 balanced (may have 4+♥) Others not forcing |
| 1♠ = 0-7 pts any shape | 1NT = 15-19 2♣ = 19+ any Others not forcing | 1♠ = majors (4/4) 11-15 pts | 2♣ = 11+ shape-ask Others not forcing |
| 1NT = 5+♦ no 4cM 7-12 pts | 2♣ = 13+ strength / shape ask 2♦ = to play Others not forcing | 1NT = 12-15 bal no 4-card major | 2♣ = 11+ shape ask major transfers 2♠ = range probe |
| 2♣ = 5+♣ no 4cM 7-12 pts | 2♦ = 16+ shape ask Others not forcing | 2♣ = 5+♣ no 4cM 10-14 pts | 2♦ = 13+ shape ask Others not forcing |
| 2♦ = 6-cd Major 3-7 pts | 2♥/♠ = pass or correct 2NT = strong enquiry | 2♦ = 5+♦ no 4cM 10-14 pts | 2♥ = 13+ shape ask Others not forcing |
| 2♥ = 5♥ & 4-cd minor | 2NT asks for minor Others not forcing | weak two 5-carder(?) not vul | 2NT = strong enquiry Others not forcing |
| 2♠ = 5♠ & 4-cd minor | 2NT asks for minor Others not forcing | weak two 5-carder(?) not vul | 2NT = strong enquiry Others not forcing |
| 2N = 5-5 minors 7-12 pts | 2NT = 5-5 minors 10-14 pts |