When to Keep vs. Break Pairs in Cribbage

The short answer: Pairs are 2 guaranteed points. They’re only worth breaking when your 4-card combination is dramatically better without them — typically a gain of 4+ expected points. In most hands, keep the pair.

Why Pairs Are More Valuable Than They Look

A pair (two cards of the same rank) scores 2 points immediately. No luck required, no starter dependency, no combinations to hope for. This “guaranteed” nature makes pairs disproportionately valuable compared to speculative fifteens or run extensions.

The threshold question is: how many guaranteed + expected points does breaking the pair gain?

The 4-Point Threshold Rule

To justify breaking a pair, your new 4-card hand must score approximately 4 more expected points than the pair-keeping version. That’s a high bar. Most of the time, the pair wins.

Pairs That Must Never Be Broken

5-5 (The Rarest, Most Valuable)

Two 5s with any face card = 10 guaranteed points:

• 5+J=15, 5+K=15 (four fifteens) = 8 pts
• 5-5 pair = 2 pts
• Total: 10 pts baseline

With a face card starter, a third fifteen adds. With a 5 starter, you hit four-of-a-kind territory. There is essentially no hand configuration where breaking 5-5 is correct.

Any Pair That Forms a Double Run

Double runs are pairs within runs. The combination scores more than the sum of its parts:

Breaking any of these pairs would destroy the double run and cost you 5-6 points. Keep them whole.

When Pairs Are Worth Breaking

Case 1: Better Run Connectivity

Hand: 6-6-7-8-9-2 (Dealer)

Wait — 6-6-7-8 IS a double run (8 pts). This beats 6-7-8-9 (4 pts). Don’t break the pair here.

True breaking case — Hand: 6-6-4-7-J-K (Dealer)

Here the pair of 6s doesn’t form a double run (no 5 or 8 adjacent). The run of 4-6-7 with a face card for fifteen potential slightly beats the disconnected pair. But only slightly — and you’re throwing a 6 to your own crib, which has moderate value. The pair might still be correct.

Case 2: The Other Cards Score Far Better

Hand: 3-3-5-6-9-K (Dealer)

Decision: Keep 5-6-9-K (6 pts: 5+K=15, 6+9=15 = 4 pts + possible flush or run). Throw 3-3 to your own crib — a pair to your own crib is worth ~4.5 pts (guaranteed 2 pts + run potential with a 4 or 5 cut). This is a case where breaking the pair is correct because:

1. The 5-based hand scores 6 pts guaranteed (+ more with a good starter)
2. The pair of 3s goes to YOUR own crib, not the opponent’s — so you keep the pair value

This is the key insight: throwing a pair to your own crib is fine; throwing to opponent’s is a disaster.

Pairs to Your Own Crib vs. Opponent’s Crib

When you’re dealer, throwing a pair to your own crib is often the right play if your hand scores significantly more without it.

Pair Strength by Rank

Not all pairs are equal. Here’s the relative value:

Low pairs (3-3, 4-4, 5-5) are most valuable because:

• They form double runs more easily with adjacent low cards
• Low cards have more fifteens potential (more combination partners)
• Low pairs are better pegging cards (opponent can’t read your hand as easily)

High pairs (K-K, Q-Q, 10-10) are weakest because they only score with a 5 for fifteens and are slow in pegging (count shoots up fast).

Pairs in Pegging

The Pair Trap

Playing a card hoping opponent will pair you — then you triple (6 pts).

Example pegging sequence:

• You lead 7 (hoping opponent holds a 7)
• Opponent plays 7 (pairs for 2 pts)
• You play 7 (triple for 6 pts)

To set this trap, you must hold a pair at the start of pegging. High pairs are actually better trap cards because opponent is less likely to suspect you’re holding a match.

High Pairs vs. Low Pairs in Pegging

Scenario Analysis

Situation 1: Pair with No Run Potential (Pone)

Hand: 2-2-8-J-K-6 (Pone)

Decision: Keep 2-2-J-K or 2-2-8-J. Keeping the pair guarantees 2 pts. Throw 6-K (low damage) or 8-6. Never throw the pair of 2s to opponent.

Situation 2: Pair Forms a Double Run (Dealer)

Hand: 7-7-8-9-4-K (Dealer)

Decision: Keep 7-7-8-9 (8 pts: double run of 3 + pair). Never break this pair.

Situation 3: Breaking the Pair Is Right (Dealer)

Hand: 9-9-5-6-J-Q (Dealer)

Decision: Keep 5-6-J-Q (6 pts: 5+J=15, 5+Q=15 = 4 pts + run potential if a 7 or 8 cuts). Throw 9-9 to your own crib (pair guaranteed + run extension if an 8 or 10 cuts). Total expected: 6 + 4.5 = 10.5 vs 5-6-9-J which gives 6 + ~2.5 = 8.5. Breaking the pair is correct here because the pair goes to your own crib.

The Decision Checklist

When facing a pair decision, ask these questions in order:

1. Does the pair form a double run? → Keep everything. Do not break.
2. Is it a pair of 5s? → Never break under any normal circumstances.
3. Am I throwing the pair to opponent’s crib? → Strongly avoid unless hand is dramatically better.
4. Can I throw the pair to MY crib? → Often correct when hand is much better without it.
5. Does breaking gain 4+ expected points? → Only then consider breaking.

Key Takeaways

1. 2 guaranteed points — treat pairs as the floor, not the ceiling
2. Double run = pair × run; never break — 8 pts beats a theoretical 4-pt alternative almost always
3. Own crib vs. opponent’s crib is the biggest factor — throwing pairs to your own crib can be correct; to opponent’s is almost never right
4. 5-5 is sacred — the highest-value pair in the game
5. J-J has nobs bonus — prefer J-J over other pairs of equal strength

For the full framework of what to keep and throw, see Discard Strategy. For how double runs score, see Double Runs in Cribbage.

Practice pair decisions in real hands: play a free game and count how many hands have a pair in your dealt 6.