==== 1 Major opening ====

=== Raise structure === 

| Transfer to major  | Constr+, 3 trumps or 4 low ODR   |
|                    | After this, 2M wouldn't go further, 3M blocking (INV with aces), and [[Major suit Game tries]]  |
| 2M                 | Weak, ~3-8HCP, depending on VUL. Opener can employ [[Major suit Game tries]] with a big hand  |
| [[1M2NT|2NT]]      | INV+, 4+M, see structure         |
| 3m                 | 5+m, 4+M, INV, or SI which needs second FIT. SI makes a 4th level cue.  |
| 3!H/1!S            | Same as 3m                       |
| 3M                 | PRE, depending on VUL.           |
| 4m, 3!S/1!H, 4!H/1S  | SPL, SI with no wastage        |
| 4M                 | To play, mostly PRE, could be tactic |


=== Constructive bidding ===

| [[1Major1NT|1NT]] | Semiforcing, no fit, up to GI BAL, can be passed with BAL MIN                       |
| [[1Major2c|2C]]  | Game forcing, any distribution. Tends to deny fit, but could be a big hand with 3M  |
| 2!D/1!S          | Constr+ 5+!H. 2!H - negative, 2!S 6!S no fit, 3!H INV, other NAT GF                 |
| 2!S/1!H          | 6!S, Constr/weak invite                                                             |