How to Establish a Suit via Ruffing

Suit establishment isn't just about cashing Aces and Kings; it is about promoting your small cards (like 5s and 4s) into master tricks. When you hold a long side suit in dummy that is missing high cards, you can execute Suit Establishment via Ruffing. This involves playing the side suit and trumping it repeatedly in your hand until both defenders are completely void in that suit. Once the defenders have no cards left, dummy's remaining small spot cards become unassailable winners.

Why ruffing out a suit works

If dummy holds a 5-card side suit (e.g., A-K-5-4-3) and you hold 2 cards (e.g., 7-2), you have two immediate winners. But the defenders hold six cards in that suit.

By playing the Ace, then the King, and then leading the 3 and ruffing it with your trumps, you strip the defenders of their cards. If they break 3-3, the suit is established. If they break 4-2, you must cross back to dummy with a different entry and ruff the 4. Now, the defenders are exhausted, and dummy's 5 is a master trick! You have traded one of your trumps for a side-suit winner.

A worked example: Promoting the small cards

Spades are trumps.

Dummy (North):

♠ 4 3 2

♥ A K 7 6 5

♦ A K

Declarer (South):

♠ A K Q J 10

♥ 3 2

♦ 4 3 2

Play of the Trick:

Win the ♥A, win the ♥K. Lead the ♥7 and ruff it high with the ♠10!

Caption: You need to establish the Hearts. After ruffing the third Heart in hand, you cross to dummy's ♦K. Lead the ♥6 and ruff it with the ♠J! If the opponents started with 3 Hearts each, they are now out. You can cross to the ♦A, and dummy's ♥5 is a master winner, allowing you to discard a losing Club.

Four common mistakes

• Drawing all outstanding trumps before ruffing the side suit, leaving yourself with no trumps to ruff the losers.
• Running out of outside entries (like the ♦A and ♦K above) to get back to dummy to enjoy the established winners.
• Ruffing with low trumps and getting over-ruffed by a defender.
• Forgetting to count how many cards the defenders have played in the suit.

When the rule does not apply

If the side suit is breaking so poorly (e.g., 5-1) that you cannot afford the entries or trumps to establish it without losing control of the hand, you must abandon the plan and rely on a different source of tricks.

Key takeaways

• Use your trumps to ruff out the missing cards in a long side suit.
• Do not draw all trumps first; you need them for ruffing.
• Carefully preserve outside entries to reach the established winners.
• Transforms worthless spot cards into master tricks.