Mastermind Game: How It Plays and Which Edition to Get

What the Mastermind game is

Mastermind is a code-breaking game for two. One player makes a secret code out of colored pegs and hides it behind a shield. The other player tries to work out that code by placing guesses, one row at a time. After every guess, the code maker gives a clue with small red and white pegs. The clues tell you how close you are. You use them to make a better guess, and then a better one, until the code is cracked or you run out of rows.

That's the whole game. There are no dice, no cards and no luck after the code is set. Every guess is a small experiment, and every clue is a result. I teach middle-school math, and I'll say this about Mastermind: it's the only test I know where the answer key tells you how close you got, right after every question.

Here are the box facts for the classic edition, from Goliath's own product page for Mastermind, which links straight to the Pressman Mastermind listing in our data:

• Players: 2
• Ages: 8+
• Play time: 0 to 20 minutes
• Contents: a game console with a built-in storage tray and code peg shield, 108 code pegs in 6 colors, 30 red and white key pegs, and the instructions
• Codes: more than 2,000 possible, by the page's count
• The challenge: crack the code in 10 moves or less

It's not a co-op game. One person makes the code, one person breaks it, and then you trade places.

How Mastermind plays

First, where this comes from. Goliath's site carries the Pressman Mastermind, and I couldn't find a rules sheet from Goliath or Pressman online that I could open and cite. So what follows is based on Goliath's two Mastermind product pages and on the listings. The full instructions are in the box, and they're the ones to follow for the details.

The two roles

• The Codemaker sets a secret code and hides it behind the shield. After each guess, the Codemaker gives clues.
• The Codebreaker places guesses, row by row, and uses the clues to narrow down the answer.

Goliath's kids' page adds that players take turns in each role. So in a full game, both players get to make a code and both get to break one.

Setting the code

The Codemaker picks colors from the code pegs and sets them in the hidden row behind the shield. Goliath's page says two things about codes that surprise a lot of first-time players:

1. You can use more than one peg of the same color.
2. You can leave a peg hole empty.

Both of those make the code harder to guess. Two reds side by side, or a gap where you expected a peg, can stall a Codebreaker for a few rows. That's how the count gets past 2,000 possible codes.

Guessing and the clues

The Codebreaker places a guess in the first open row. The Codemaker looks at the guess, compares it with the hidden code, and answers with red and white key pegs next to that row. Red and white mean different things. The exact meaning of each color is printed in the box's instructions, so read that part out loud before the first game and make sure both players agree on it. A single wrong clue can ruin the whole round, and nobody notices until the shield comes up.

Then the Codebreaker guesses again, using what the clues said. The goal on Goliath's page is to crack the code in 10 moves or fewer.

How to get better at it

This is my advice, not the maker's:

• Change one thing at a time. If you swap three pegs between guesses and the clue changes, you won't know which swap did it.
• Write down what you've ruled out. A scrap of paper works. Your memory will tell you red was out when it wasn't.
• Don't forget the empty hole. If the clues stop making sense, check whether the code has a gap in it.
• Read the whole board, not just the last row. Every row is evidence. The fourth clue often makes sense only next to the second one.

Lucho's take: "That's diagnostics. Change one part, read the result, then change the next part. The same goes for an engine that won't start."

How a game ends

A round ends when the Codebreaker cracks the code or runs out of rows. Then the shield comes up, and the players switch roles. How many rounds make a game, and how you keep score across rounds, is set by the box's instructions. If your box leaves scoring loose, the house rules below give you a simple way to keep it.

House rules some families use

These are house rules, not printed rules. Try the game as the box describes it first.

• House rule: no repeats, no gaps for beginners. The Codemaker uses each color once and fills every hole. That cuts the number of possible codes a lot, and a new player gets to a win sooner. Add repeats and gaps back once the clues make sense.
• House rule: teams. Two players make the code together, two break it together. The breakers have to talk through every guess out loud, which is a good way to teach the reasoning.
• House rule: best of five. Each player makes a code and breaks one per round, and you count rows used. Fewer rows wins the round.
• House rule: the clue gets checked. Before the Codebreaker places the next guess, the Codemaker checks the last clue one more time. Mistakes happen, and a wrong clue is the one thing that can't be fixed later.

Mastermind editions on Amazon US right now

Our data for this page lists three Mastermind editions on Amazon US as of October 2026, matched by the name on the listing. The table above shows the players, ages and play times each listing states. A dash means the listing doesn't say.

Pressman Mastermind, the classic

The listing says ages 8+ and exactly 2 players. It's the edition Goliath's Mastermind page links to, so the box facts above apply to it: 108 code pegs in 6 colors, 30 key pegs, a console with a storage tray and a shield. If you want the game as it's described on this page, start here.

Mastermind Junior: What's for Lunch?

The listing names it Mastermind Junior: What's for Lunch?, gives ages 5+ and 2 players, and marks it as a junior edition. It's sold under the Goliath name.

Here's a wrinkle. Goliath's own "Mastermind for Kids" page links to this same Amazon listing, but describes a jungle-animal version: 72 jungle animal pegs in 6 colors, 15 red and 15 white scoring pegs, a plastic base with a storage tray, three levels of play, and ages 6+. The listing's name and the maker's page don't describe the same theme, and they don't agree on the starting age. Look at the listing photos to see which box is actually for sale, and go by 6+ to be safe.

Either way, the kids' version keeps the same idea: one player hides a code, the other cracks it from clues. Goliath's page says the three levels let a child move up as they learn.

Retro Mastermind

The listing calls it Retro Mastermind, a retro or vintage reissue sold under the Pressman name. It doesn't list players or ages, and it isn't marked as resale stock. If you remember a particular look of the game from years ago, this is the listing that's selling the look. For anything beyond the name, check the listing itself.

Which Mastermind edition fits your table

My one opinion for this page: the age on the box works in both directions. The classic game is 8+ because the Codebreaker has to hold several clues in their head at once and reason across rows. A 6-year-old can place pegs happily but will often guess at random, which is no fun for either player. That's what the kids' version is for. Going the other way, a junior box with three adults at the table won't hold them long.

Some quick matches, by the listings:

• The classic game for ages 8 and up: Pressman Mastermind
• A younger child, by the listing's age: the junior edition, with the age caveat above
• A gift for someone who remembers the old look: Retro Mastermind, after checking the listing details

Who Mastermind suits

Mastermind fits two people who like a quiet puzzle with a clear answer. It suits:

• A parent and a kid, especially once the kid can be the Codemaker too
• Two adults who like logic puzzles and want something shorter than a full board game
• Anyone who enjoys Guess Who or Battleship and wants a version with more reasoning in it
• A solo puzzler with a patient partner, since the Codemaker's job is mostly to answer clues carefully

Being the Codemaker is a good job for a younger player who's still learning. It teaches them to compare two rows carefully, and it gives them the satisfying moment of lifting the shield.

Who should skip Mastermind

Skip it if your group is three or more and nobody wants to sit out. The game is built for two, and the listings in our data say so. A team version is a house rule.

Skip it too if your table wants talk, laughter and bluffing. Mastermind is a game of careful, quiet thinking, and a round can pass with a few words.

And skip it for now if there's a child under 3 in the house. Code pegs and key pegs are small parts, and there are a lot of them. Check the age label on the listing. Toys with small parts are a choking hazard for children under 3. Count the pegs back into the tray before you close the box.

If you like Mastermind, look at these

Picked by what they share with Mastermind: two players, hidden information and a question-and-answer rhythm.

• Guess Who: ask yes-or-no questions to narrow down a hidden face
• Battleship: call coordinates and read hit-or-miss clues
• Kanoodle: a logic puzzle you can play alone
• Strategy board games: longer games built on planning
• Clue: deduction for a bigger table, with a notepad

Change one peg at a time. Then read the clue twice.