Landy advances
Partner’s Landy 2♣ shows both majors (4+♠ 4+♥, 10–15; 5–11 by a passed hand). Unlike Ekren, Landy is not a preempt, so there is no relay to discover strength — the advancer places the contract directly. Weak hands take a preference, invitational hands jump to 3M, and game hands bid 4M or offer a COG with 4♣.
| (1NT) 2♣ - | |
|---|---|
| 2♦! | (R), ♥ = ♠ |
| 2♥ | COMP, ♥ > ♠ |
| 2♠ | COMP, ♠ > ♥ |
| 2NT! | TRF, 6+♦ |
| 3♣ | NAT F |
| 3♦ | NAT F |
| 3♥♠ | INV, 4+# |
| 4♣! | COG |
| 4♥♠ | S/O |
The 2♦ relay holds no diamonds of its own — the 2♣ bidder cannot pass and names the better major to play.
| (1NT) 2♣ - 2♦ - | |
|---|---|
| 2♥ | ♥ ≥ ♠ |
| 2♠ | ♠ > ♥ |
The COG transfers right-side the major so the overcaller declares and the lead runs up to the concealed advancing hand.
| (1NT) 2♣ - 4♣ - | |
|---|---|
| 4♦! | TRF, ♥ ≥ ♠ |
| 4♥! | TRF, ♠ > ♥ |