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Gin rummy strategy

Knock as soon as your deadwood allows it, and don't hold out for gin unless you're very close. Keep the cards that can still grow into melds, like pairs and two cards in a row, and throw away high cards that aren't doing anything. Take from the discard pile only when the card makes a meld or lets you knock.

By Emre Özen, updated October 8, 2026. The numbers come from 1,000 games between two copies of our strong computer player, a set of test matches against altered copies of it, and 200,000 dealt hands. New to the game? Start with how to play gin rummy.

Know where you start

A random ten-card deal is a mess. Across 200,000 dealt hands, the average deadwood was 56.5 and the middle value was 58. Only about 1 deal in 1,400 could knock straight away, and a dealt gin came up 2 times.

So each hand is a race to get from the mid 50s down to 10 or less before the other player does. You don't get long. In our games a hand lasted 11.7 draws in total, so about 6 each. Every draw has to count.

Knock early

This is the biggest one. Waiting for gin feels good when it lands, but it hands the other player extra turns to knock first. We tested it: a copy of our strong player that never knocked and only ever went gin won 212 of 500 games against the normal one, which knocks.

Our strong player knocks the first turn it can, with one exception. If it's within 3 points of gin and the stock still has 15 or more cards, it plays on for the 20-point gin bonus. When it did knock, its average count was 7.8.

The risk of knocking is the undercut. In our games 11.5% of hands ended in one, against 81.3% won by the knocker and 7.1% ending in gin. Remember that a tie goes to the defender, so knocking with 10 against someone who might also be on 10 or less carries a real risk of an undercut.

Keep cards that can grow

Two cards that are one card away from a meld are worth more than they look. Count the cards that would finish them (players call these outs):

You hold	Cards that make a meld	How many
A pair: 7♠ 7♥	7♦, 7♣	2
Two in a row: 7♥ 8♥	6♥, 9♥	2
A gap: 7♥ 9♥	8♥	1
Pair plus neighbor: 7♠ 7♥ 8♥	7♦, 7♣, 6♥, 9♥	4
A king and queen of one suit: Q♥ K♥	J♥ (nothing above a king)	1

Outs only count while those cards are still out there. If 6♥ and 9♥ are already in the discard pile, your 7♥ 8♥ is dead, so throw it. Our strong player does this counting on every turn: for each card it could throw, it weighs the deadwood left against how likely the next draws are to help. A copy of it that ignored future draws and only looked at deadwood won 195 of 500 games against the normal one.

Throw high cards early

A loose king costs 10 if the hand ends now; a loose ace costs 1. Early in the hand, when nobody is close to knocking, that matters less than outs. A few draws in, it matters a lot, because you knock by getting under 10 and the other player may knock on you at any moment. Kings are also the hardest cards to build on in a run, since nothing ranks above them, so a lone king or queen should usually be among the first cards to go.

Low cards work the other way. An ace, 2 or 3 left over still lets you knock, so late in a hand it's worth hanging on to them.

Pick up with care

Every card you take from the discard pile is a card the other player sees. If you take the 7♥, they'll guess you have sevens or hearts nearby and stop throwing them. So take a discard when it finishes a meld or drops your count enough to knock, and otherwise draw from the stock. Our strong player took the upcard 29.8% of the times it was offered.

Read the discard pile

Watch what the other player picks up and what they throw. If they took the 8♣, think twice about throwing the 7♣, 9♣ or another 8. If they threw a jack, the other jacks are probably safe for a while. Our game shows the cards the other player has picked up and still holds, and lists every discard of the hand under "Every discard this hand", so you don't have to remember it all.

To be fair about the evidence: in our test, a copy of our player that ignored all of this won 254 of 500 against the normal one, which is too close to call. Your own hand matters more. Use the pile as a tie-breaker when two discards look equally good.

Does dealing matter?

Hardly. The non-dealer sees the upcard first, but in our games the non-dealer won 49.9% of the hands that had a winner. Since the winner of each hand deals the next, you'll often be dealing while you're ahead.

Our numbers

What we measured	Result
Average deadwood in a dealt hand	56.5
Hands in an average game to 100	10.1
Hands won by a knock / gin / undercut	81.3% / 7.1% / 11.5%
Average points for a knock / gin / undercut	15.0 / 38.6 / 14.1
Average count when knocking	7.8
Games won by the player who dealt first	48.7%
Shutouts (loser scored nothing)	4.5%
Average final margin, with bonuses	206
Strong computer's wins against the easy one	650 of 1,000 games

Method: 1,000 full games to 100 between two copies of our strong computer player, each with its own shuffle and a cut for the first deal, plus 500-game matches for each altered player, October 2026. Computer players aren't people, and a few hundred games still leave a few points of chance either way, so read these as one benchmark.

Practice with hints

The quickest way to get better is to play and check. In our gin rummy game, the Hint button tells you whether the strong computer would take the top discard, which card it would throw, and when it would knock. You get 6 hints per game. Your deadwood is counted live as you play, and the gin rummy calculator will find the best melds for any hand you want to study.

Sources

Our simulations, October 2026, using the same code as our game.
John McLeod, "Gin Rummy", pagat.com: the rules the numbers are based on.