How to Handle a 4-3 Trump Fit
Playing in a 7-card (4-3) trump fit requires careful management. Avoid drawing trumps early, and never let the defenders force you to ruff in the 4-card hand.
Occasionally, competitive auctions or bidding system limitations will land you in a contract where you and dummy hold a 4-3 trump fit (7 total trumps), known as a Moysian fit. This is a precarious situation because the defenders hold 6 trumps. If you play the hand like a normal 8-card fit, you will lose control. The golden rule of a 4-3 fit is: Do not draw trumps immediately, and protect the 4-card trump hand at all costs.
Why Moysian fits require special care
If you hold 4 trumps and draw three rounds of trumps to clear the defenders' cards, you will have only one trump left. If the defenders lead a side suit that you are void in, you must ruff with your last trump. You are now out of trumps, and the defenders take control of the hand.
Instead, you must use the 3-card trump hand (usually dummy) to ruff your losers. The 4-card hand must be preserved to stop the opponents' long side suits later in the hand.
A worked example: Protecting the long hand
You are declaring 4♠ in a 4-3 fit.
Dummy (North):
♠ 4 3 2 (3 Trumps)
♥ 2
♦ A K Q 4 3
♣ 7 6 5 4
Declarer (South):
♠ A K Q J (4 Trumps)
♥ 6 5 4 3
♦ 2
♣ A K Q 2
Play of the Trick:
West leads the ♥K.
Caption: You have a 4-3 Spade fit and three Heart losers. Do NOT draw Spades! If you do, you will go down. Let West win the ♥K and ♥Q. When they play a third Heart, ruff it in dummy with the ♠2. You have used the short hand to ruff, while South's powerful 4-card trump holding remains intact to draw the defenders' trumps safely.
Four common mistakes
- Drawing trumps at Trick 1 out of habit.
- Ruffing side-suit losers in the 4-card trump hand, causing you to lose trump length against the defenders.
- Failing to cash your side-suit winners (like Clubs or Diamonds) before the opponents gain the lead and draw your remaining trumps.
- Panicking when the opponents lead trumps to stop you from ruffing in dummy.
When the rule does not apply
If your side-suits are completely solid and you have no losers to ruff in the short hand, you may be able to afford drawing trumps immediately, provided the outstanding trumps break a friendly 3-3.
Key takeaways
- A 4-3 fit is called a Moysian fit.
- Do not draw trumps immediately.
- Ruff losers in the 3-card trump hand.
- Never ruff in the 4-card trump hand if it can be avoided.