5. 1S OPENING
REQUIREMENT: 10-14 HCP, 4+/4+ minors, may be three-suited
The 1S relay structure is truly symmetric, and also uses a forcing 1NT response similar to the 1D and 1H openings.
RESPONSES SUMMARY
| Pass | To play with spades |
| 1NT | Balanced or semi-balanced hand, 0-11, forcing. |
| 2C | GAME FORCE RELAY |
| 2D | Signoff |
| 2H | Fit showing jump for a minor - 2NT inquires |
| 2S | Fit showing jump for a minor - 2NT inquires |
| 2NT | Pre-emptive with both minors |
| 3C | Pre-emptive |
| 3D | Pre-emptive |
| 3H | Pre-emptive with 9 cards in hearts and a minor |
| 3S | Pre-emptive with 9 cards in spades and a minor |
| 3NT | To play |
| 4C | Preemptive |
| 4D | Preemptive |
Opener is expected to bid a 5-card suit. Exceptionally this
might be 2H or 2S in a 0544 or 5044 hand. Only 1444 or 4144 hands
may be passed.
Further bidding is not constructive.
| 2D | Three-suiter with both minors (see 1C opening structure section 2.4 for relay continuations) |
| 2H | Reverser: 5+ C, 4D |
| 2S | 5/5 |
| 2NT | High shortage, 5+D, 4C, etc. |