I've been asked for my notes on Gazilli so here they are. Now you no longer need to weigh up whether to jump rebid on your nice 5-5 shape 15 count, it's in the system!
Gazilli makes most sense in a 2/1 system where the 1NT response to a major opening can be a wide range.
Rebid structure
After opening 1
♥ and hearing 1♠ from partner opener rebids like this. The structures if partner responds 1NT to either major opening are identical:
1NT | 11 — 14 | balanced |
2♣ | Gazilli | |
2♦ | 11 — 16 | 3+♦ |
2♥ | 11 — 16 | 6+♥ |
2♠ | 14 — 16 | 6♥ & 5♠ |
2NT | 14 — 16 | 6♥ & 4+m |
3♣ | 14 — 16 | 5♥ & 5♣ |
3♦ | 14 — 16 | 5♥ & 5♦ |
3♥ | 14 — 16 | 6+♥ (great suit) |
Note that all 17
+ hands go through Gazilli.
2NT rebid
Opener has shown a 6-4 shape with a better than minimum hand. Responder can now bid 3M to play, 3♣ pass or correct or 3
♦ asking for the minor.
Gazilli
Gazzilli is a 2♣ rebid after a 1 of a major opening and is either natural showing clubs or conventionally 17
+. The responses are as follows:
1
♥ — 1♠ — 2♣ — ?
2♦ | 8+ | any |
2♥ | 5 — 7 | 2+♥ |
2♠ | 5 — 7 | 6+♠ |
2NT | 5 — 7 | 3 suited short ♥ |
3♣/♦ | 5 — 7 | 6+♣/♦ |
1
♥ — 1NT — 2♣ — ?
2♦ | 8+ | any |
2♥ | 5 — 7 | 2+♥ |
2♠ | 5 — 7 | 3 suited short ♥ |
2NT | 5 — 7 | 5+♣ 5+♦ |
3♣/♦ | 5 — 7 | 6+♣/♦ |
1♠ — 1NT — 2♣ — ?
2♦ | 8+ | any |
2♥ | 5 — 7 | 5+♥ |
2♠ | 5 — 7 | 2+♠ |
2NT | 5 — 7 | 3 suited short ♠ |
3♣/♦ | 5 — 7 | 6+♣/♦ |
Priorities
Responder with a weak hand should first look to bid a 7
+ suit of their own then two of openers major with 2
+ support finally a shorter suit or three-suited hand.
Follow Up
When responder bids 2
♦ opener either rebids their major showing the weak option or any other bid 17
+ GF.
If responder makes another bid they have a tight range of hands and opener is usually well placed to pick the contract or invite.
2NT and 3NT rebids
If opener rebids 3NT after Gazilli it shows 18 — 19 balanced, 5M332. The 2NT rebid can be used in one of two ways: to show 15 — 17 balanced (if you don't like 5M332 in your 1NT) or like the immediate 2NT rebid to differentiate a sixth card in the major suit.
Examples
West | East |
1♥ | 1♠ |
2♣ | 2♦ |
3♣ | 3♦ |
3NT | |
West shows 17
+ points, 5
+♥, 4
+♣ and a diamond stop. East has shown 4
+♠ and 8
+ points. The auction may be over at this point or East can bid on.
West | East |
1♠ | 1NT |
2♣ | 2♦ |
2♠ | 3♣ |
West has a natural 2♣ rebid, East shows 8 — 9 points by signing off in 3♣, 2NT would have been invitational.
West | East |
1♠ | 1NT |
2NT | 3♦ |
3♥ | 4♣ |
At 3
♥ West has shown 14 — 16 points with a 6-4 shape in spades and clubs. East has agreed clubs and is waiting for a cue.
West | East |
1♥ | 1NT |
2♣ | 2♥ |
3NT | Pass |
West has 18 — 19 points balanced. East has 5 — 7 with 2 or possibly 3 hearts. East has denied a long suit.
West | East |
1♥ | 1♠ |
2♣ | 2♠ |
Pass | |
East has 5 — 7 with 6
+ spades. West has a natural 2♣ rebid or a poorly fitting 17 count.