Guess the Number

About Guess the Number

Guess the Number is a logic game where you try to crack a secret four-digit number using color clues. After every guess, digits in the right spot light up green and the others stay gray. Luck helps a little, but what wins the game is reading the clues carefully.

Who is it for?

It's made for people who love puzzles and code-breaking. The two-player online duel is ideal for a quick rivalry between two friends, siblings or a couple. Solo mode is a calm puzzle that keeps your mind busy on the bus or in a line. Kids who are good with numbers pick it up easily too.

How to play

Online duel

1. Open a duel room and send the code to the other player; each of you uses your own device.
2. At the start, you both secretly choose a four-digit number.
3. Take turns guessing each other's number. Digits in the right spot turn green; the rest stay gray.
4. Whoever cracks the other's number first wins on the spot. You have half a minute to enter a guess; if you're too late, your turn passes to your rival.

Solo

The phone secretly picks a four-digit number, and you try to find it. There's no timer. When all four digits turn green, you've found the number. Your record is the fewest guesses you needed.

Rules

• The number is between 0000 and 9999. Digits can repeat, and the number can start with zero.
• There are only two colors: green means "this digit is in this spot", gray means "not in this spot". A gray digit can still be in another spot.
• In an online duel, there's no equalizing turn; the first to light up four greens ends the game.

Tips

• Each spot is solved on its own. Try a different digit in every spot in the same guess, so one guess gives you four pieces of information.
• In the worst case, ten guesses are enough: trying 0 to 9 in every spot always finds the number. Good players finish much sooner.
• Keep a green digit in the same spot on your next guess, and only change the gray ones.
• When you pick your own number, stay away from obvious sequences like 1234 or 0000.

Example situations

• You guessed 1234 and only the second spot turned green: the number's second digit is 2, and 1, 3 and 4 aren't in their spots.
• Your rival has found three digits and you've found two: one lucky guess can turn the game around.

FAQ

How many players?

One or two. The online duel is exactly two players; in solo mode, your opponent is the phone itself.

Is it free?

Yes. Both modes are free in your browser, with nothing locked and no sign-up.

Do I need a phone?

In a duel, the numbers you choose have to stay secret, so you need two separate devices. When you play solo, the browser on your phone or computer is enough.