What is the most common mistake in cribbage?

Bad discards to the crib. Many players throw cards to the crib without considering the mathematical impact on both their hand and the crib. When it's your crib, you should discard cards that work together (like 5s and face cards). When it's your opponent's crib, avoid giving them cards that easily form combinations, especially 5s, which pair with so many cards for fifteens.

How much does miscounting actually cost per game?

Studies of club-level cribbage players show that miscounting costs an average of 2–4 points per game. In a game where the average margin of victory is 10–15 points, that's significant. Under muggins rules, where your opponent can claim your missed points, the cost doubles because they gain what you lose.

Should I always peg aggressively?

No. Whether to peg aggressively or defensively depends on board position. When you're behind, aggressive pegging (pairing, running sequences) helps close the gap. When you're ahead, defensive pegging (playing off-cards, avoiding giving pairs and 15s) protects your lead. Pegging without regard to the score is a common intermediate-level mistake.

What's the biggest mistake when playing to an opponent's crib?

Throwing a 5 to your opponent's crib. A 5 in the crib combines with any 10-value card (10, J, Q, K) for a fifteen, and there are 16 ten-value cards in the deck. Additionally, throwing connected or suited cards to the opponent's crib gives them easy combinations. The safest discards to an opponent's crib are low, disconnected, different-suit cards like A-9 or 2-8.

How do I stop miscounting my hands?

Use a systematic counting method: count fifteens first (check every two-card, three-card, four-card, and five-card combination), then pairs, then runs, then flushes, then nobs. Always count in the same order so you don't skip categories. Practice counting hands without time pressure until the process becomes automatic.

Common Cribbage Mistakes to Avoid

Bad discards, miscounting, poor pegging, and ignoring board position — fix these leaks and win more games.

March 11, 2026 5 min read

Common Cribbage mistakes cost players games they should win. Here are the most frequent errors — and how to fix them immediately.

Every cribbage player makes mistakes — beginners and experienced players alike. The difference between a good player and a great one often isn’t brilliant play; it’s fewer errors. Eliminating common mistakes is the fastest path to improving your win rate.

Mistake 1: Bad Discards

Discarding to the crib is the most consequential decision in cribbage, and it’s where the most points are lost.

Common Discard Errors

Error	Why it’s costly	Better approach
Throwing a 5 to opponent’s crib	Combines with 16 ten-cards for fifteens	Keep the 5 or throw it only to your own crib
Breaking up a run to keep a pair	Runs score more than pairs on average	Calculate both options — runs usually win
Ignoring the crib entirely	Your crib is worth ~4.5 points on average	Factor crib potential into every discard decision
Throwing connected cards to opponent	Gives them easy runs and fifteens	Throw wide, disconnected cards (A-9, 2-8)

The Math of Discards

Every discard decision has an expected value. A hand’s value includes:

Hand score — points in your four remaining cards
Crib impact — added or lost crib value (positive if your crib, negative if opponent’s)
Cut card potential — how much your hand improves with various cut cards

Players who only consider #1 consistently choose wrong. Factor in all three to find the mathematically best discard.

Mistake 2: Miscounting Hands

Miscounting is embarrassingly common, even among experienced players. It’s not just a beginner issue — complex hands with multiple fifteens, overlapping runs, and flushes are easy to miscount.

Where Miscounts Happen

Fifteens: Missing a three-card or four-card combination that totals 15. Example: holding 2-3-5-5, many players see the two five-and-ten combinations but miss 2+3+5+5 = 15.
Double runs: A hand like 3-4-4-5 contains a double run (3-4-5 twice) plus a pair. That’s 8 points for runs + 2 for the pair + any fifteens — players frequently undercount these.
His Nobs: Forgetting to count one point for a jack that matches the suit of the cut card.
Flushes: A four-card flush in hand scores 4 points (5 if the cut matches). Players sometimes forget to check, especially when focused on fifteens and runs.

How to Count Systematically

Always count in this order:

Fifteens — Check all two-card combos, then three-card, then four-card, then five-card
Pairs — Count each pair (2 points), three of a kind (6 points), four of a kind (12 points)
Runs — Find the longest run, check for double and triple runs
Flush — Four cards of the same suit in hand (not counting the crib, where all five must match)
Nobs — Jack matching the cut card’s suit

Mistake 3: Poor Pegging Decisions

Pegging accounts for roughly 15–20% of total points, but many players treat the play phase as an afterthought.

Common Pegging Errors

Leading with a 5: A 5 lead lets your opponent play any 10-value card to score fifteen (2 points). Lead with low cards (A, 2, 3, 4) or pairs you want to trap with instead.
Pairing when the count is low: If your opponent leads a 4 and the count is only 8, pairing gives them a potential pair royal for 6 points. Pair safely only when the resulting count makes a triple unlikely (count above 21 prevents further pairing).
Not tracking cards played: Forgetting which cards have been played leads to miscalculating the count and missing scoring opportunities. Pay attention to every card, not just your own.
Ignoring 31: Getting to exactly 31 scores 2 points, but many players play cards that put the count at 27–30, handing their opponent an easy 31.

Mistake 4: Ignoring Board Position

Cribbage is a race to 121 points. Your strategy should change based on where you are on the board relative to your opponent.

Position-Based Strategy

Board position	Strategic approach
Ahead by 10+ points	Peg defensively, make safe discards, protect your lead
Roughly even	Balance offense and defense, play standard strategy
Behind by 10+ points	Peg aggressively, take risks with discards, maximize hand value
Near the finish (100+ points)	Count the board — can you go out this deal? Adjust pegging accordingly

The “26-Hole” Rule

Many experienced players track their expected position at key points. By the end of the first hand as dealer, you should ideally be around hole 10. By fourth street (the halfway point), around hole 60. If you’re significantly behind these benchmarks, shift to aggressive play. If ahead, tighten up.

Mistake 5: Forgetting the Cut Card

The cut (starter) card affects your hand score, your opponent’s hand, and the crib. Many players select their discards without considering which cut cards help their hand the most.

How to Think About the Cut

Before discarding, ask:

How many cut cards improve my hand significantly? If keeping one set of four cards gives you 12 “good” cuts and another gives you 6, the first option has higher expected value even if its current score is slightly lower.
Does the cut help my opponent’s likely crib? If you’ve thrown your opponent a 6-7, a 5 or 8 cut could turn their crib into a monster.

Mistake 6: Inconsistent Strategy as Dealer vs. Non-Dealer

The dealer has a structural advantage: they get the crib, which averages about 4.5 points. Non-dealer compensates by pegging first and getting the go more often.

Role	Priority	Common mistake
Dealer	Maximize hand + crib total	Ignoring crib potential in discards
Non-dealer	Maximize hand value, peg aggressively	Being too passive during pegging

How to Eliminate Mistakes

Slow down. Most errors happen when players rush through counting or discarding.
Count every hand twice. Before pegging your score, verify by counting in a different order.
Review close decisions. After a game, think about hands where you had a tough discard choice. Would the alternative have scored better?
Play under muggins rules. When your opponent can claim your missed points, you’ll learn to count accurately very quickly.
Practice counting. Deal random hands and count them for speed and accuracy. There’s no substitute for repetition.

Play Cribbage for free on Rare Pike and put what you’ve learned into practice.

Practice Makes Fewer Mistakes

The fastest way to eliminate errors is repetition. Play free games, count every hand carefully, and watch your win rate climb.

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