Practice Hand 2 · Bidding · Deal 10 from Chapter 26

Jacoby Transfer with 5-4 Majors

Why bid 3 after the transfer instead of jumping to 4?

North · 1NT Opener

A J 3
K 8 4
K Q 5 2
K J 9

17 HCP

South · Responder

K Q 9 5 2
A Q 7 3
8 4
7 3

11 HCP

Contract: 4 (bidding problem — no lead)
The Auction:
WestNorthEastSouth
Pass1NTPass2
Pass2Pass3
Pass4PassPass
Pass
Your task: After North completes the spade transfer with 2, why does South bid 3 instead of simply bidding 4?

Solution

South is showing a second suit, not just one

South holds 5 spades AND 4 hearts. By bidding 3 after the transfer, South is saying: "I have 5 spades and 4 hearts — partner, you choose the best fit."

Why North picks 4

North holds 3 spades and 3 hearts. Both fits are equal in length (8 cards each), so North chooses on quality: the spade honours (AJ3) are stronger than the heart honours (K84). 4 it is.

If North had held 4 hearts and only 2 spades, North would have chosen 4 instead. The point is that South gives North enough information to find the best contract every time.

The rule

Always transfer to the 5-card major first, then show the 4-card major at the next opportunity. This sequence gives opener two pieces of information — both of your majors — before the partnership has to commit to a strain.

Key point: Bidding 4 directly hides your 4-card heart suit. When opener holds 4 hearts and only 2 spades, you'll play in your worst major fit. The transfer-then-show sequence prevents that.

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