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12RB - The opener fits the responder's major -
level 2 ★
1)The opener has a four-card fit in the responder's major,
With a first-zone hand (12-14HCP), the opener fits at level 2
With a second-zone hand, the opener fits at level 3. This non-forcing bid is a game proposal.
With a third-zone hand: support at level 4, Splinter or the first control, depending on strength and distribution.
S
W
N
E
1
Pass
1
Pass
2
7
4
10
8
6
2
K
4
A
K
Q
J
9
Problem E1197 The low level support indicates - a 4-card fit in hearts and an ordinary first-zone opening (12-14HCP)
S
W
N
E
1
Pass
1
Pass
3
4
2
A
K
10
9
7
4
A
K
J
9
8
Problem E1204 Jump support to show the 4-card fit and second-zone strength.
The opener has a fit and a third-zone hand.
without anything extra , triple raise at level 4 in the major
with a void or a singleton, Splinter (double jump shift in that suit)
- a 4-card fit in hearts and an ordinary first-zone opening (12-14HCP)