One Advantage of Gazilli

This is a deal in the last segment of the Asia Cup Trial Final for Open series in Hong Kong.
It was not a difficult slam to reach if you have adopted Gazilli in your 2/1 system.


West

1 NT1
D
4 NT
H
North
Pass
Pass
Pass
Pass
AP
East
S
H2
S
S3
South
Pass
Pass
Pass
Pass
Board 25
IMPs
E-W Vul
S 9 6 5
H 9 5
D Q 8 2
C A 5 4 2
S 8 2
H A 8 4 3
D A 9 6 5 4 3
C Q
TableS A Q 7 3 2
H K Q J 7 2
D J
C K 8
1. Forcing
2. 5+ cards, 15-16 HCP
3. 2 Keycards with sQ
S K J 10
H 10 6
D K 10 7
C J 10 9 4 3

If you adopt Gazilli in your 2/1 system, after forcing 1NT response, your 3-level rebids are invitational with about 15-16 HCP. Any strong hands with 17-21 HCP have to rebid 2C or 2NT. This gives a more accurate bidding structure, especially when opener is 15-16 HCP with 5-5 in two suits.

Imagine Gazilli is not used, East has to rebid 2H and West has no choice other than raising to 4H.

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