| (2Y) | NAT |
| X! | T/O, 12+ |
| 2Z | NAT, 12–17, 5+# |
| 2NT | NAT, 16–18 |
| 3X | NAT, 14–18, often 6+# |
| 3Y | Ask for stopper, SOL 7+ suit or STR T/O |
| 3Z | NAT, 15–17, 6+# |
| (2m) | NAT |
| 4m! | Leaping Michaels, 5+♠, 5+♥ |
| 4om! | Leaping Michaels, 5+♠♥, usually 5+# |
| 4NT! | NF S/T in om |
| (2M) | NAT |
| 3M! | Ask for stopper, SOL 7+ suit or STR 4+♣ 4+♦ |
| 4m! | Leaping Michaels, 5+OM, usually 5+# |
| 4M! | Leaping Michaels, 5+♦, 5+♣, usually unstopped |
| 4NT! | NF UNT with stopper, 5+♦, 5+♣ |
I don’t recommend Rumpelsohl for (2♣) X. It works
better at (2♦♥♠). I have a better yet simple plan: Rubens advances.
| (2♣) X- | T/O |
| 2X | NAT NF |
| 2NT | NAT INV |
| 3♣! | INV+ TRF, 5+♦ |
| 3♦! | INV+ TRF, 5+♥ |
| 3♥! | INV+ TRF, 5+♠ |
| 3♠! | FG, usually 6+♦ |