Mastermind

How to Play

Basics

• Goal: guess the 4-color code in 6 turns.
• Duplicates are allowed.
• Black peg = correct color + correct position.
• White peg = correct color in wrong position.
• Time starts when you place the first peg (where applicable).

Controls

• Tap colors to fill the current row.
• Tap a placed peg in the current row to remove it.
• Undo = removes last peg.
• Clear Row = clears the current row.
• Submit Guess checks your row (enabled only with 4 pegs).

Modes

• SOLO: random secret, play anytime, results count in stats.
• TWO PLAYERS: Player 1 sets the secret, pass device, Player 2 guesses.
• MATCH CODE: same code gives same secret for fair offline race; use a fresh code each match.
• DAILY (Official): same secret for the UTC day, one official try per device, can appear on leaderboard.
• DAILY PRACTICE: same daily secret, unlimited practice, does not post or lock daily attempt.

Tips

• Start with 4 different colors to map the code.
• Use feedback to narrow positions, not just colors.
• Duplicates are possible, so a color can repeat.

Daily uses UTC day (not local time).

Lifetime Stats

Played: 0

Wins: 0

Win Rate: --

Best Attempts: --

Best Time: --

Avg Attempts (wins): --

Avg Time (wins): --

Daily Challenge

One official run per UTC day per device.

Daily Leaderboard

UTC Date: --

Updated: --:-- UTC

No entry yet today.

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One try per device per day. UTC day.

Daily already played today.

Player 1: Set the secret code

Pick 4 colors. Duplicates are allowed.

Pass device to Player 2

The code is hidden. Player 2 can now start guessing.

Match Code

Use one-time match codes for fair offline play.

One-time Match Code

Send this code to the other player. Use a fresh code each match.

AA-0000-00

Join Match

Type or paste code; it will auto-format.