(1Y)-X
The takeout double is one of the oldest conventions. Most players bid naturally to the double. However, I suggest transfer advances at 3Y+. This way, we can separate paths to suit games by strength and by length.
| (1Y)-X | T/O |
|---|---|
| 1Z | NAT NEG, 0–7, usually 4+# |
| 1NT | CONST, 8–10 |
| 2X | NAT NEG, 0–9, usually 4+# |
| 2Y! | RESP. INV 4= suit with stopper. FG. |
| 2Z | Mild INV, 8–12, 4+# |
| 2NT | INV, 11–12 |
| 3X | INV, 10–12, 5+# |
| 3YZ! | TRF INV+, 10+, 5+ next suit |
| 3♠! | Ask for stopper |
| (1M)-X | T/O |
|---|---|
| 4m! | Leaping Michaels, 5+oM, usually 5+# |
| 4M! | Leaping Michaels, 5+♦, 5+♣ |
| 4oM | PRE, usually 7+# |
| 5m | PRE, 7+# |
| (1m)-X | T/O |
|---|---|
| 4m! | Leaping Michaels, 5+♠, 5+♥ |
| 4om! | Leaping Michaels, 5+M, usually 5+# |
| 4M | PRE, usually 7+# |
| 5om | PRE, 7+# |