1v1 Sun & Moon head to head

Sun & Moon 1v1
Who balances it first?

Same grid, same signs, same givens. Send a friend a link, start on the same 3-2-1, and fill every square before they do.

Play today’s Sun & Moon

Free, no account. Send the link, keep this page open, and the race starts the moment your friend opens it.

How a Sun & Moon duel works

  1. 1One grid for both

    A fresh Sun & Moon grid is made for your match, with exactly one solution. You and your friend get the same givens and signs.

  2. 23-2-1, go

    The race starts the moment your friend opens the link: a shared countdown, so you both start at exactly the same time.

  3. 3Balance every line

    Each row and column gets equal suns and moons, never three of a kind in a row. Their bar counts the squares they have filled.

  4. 4No hints

    Hints are off in a race. Undo and Clear still work, and rule breaks still light up red.

Who wins?

Both finish

The first correct grid wins. Times are measured on our server from the shared start.

Someone leaves, drops out for 15 seconds, or makes no move for 2 minutes

The other player wins straight away.

Want another go?

Either of you can offer a rematch: one tap, a new grid, a new 3-2-1.

1v1 Challenge

Beat a friend at Sun & Moon

Same grid, same signs. Balance the suns and moons before they do.

All 1v1 games →

  1. Send a link

    WhatsApp, text, anywhere. No sign-up needed.

  2. Same puzzle

    You both get the exact same board.

  3. Race & rematch

    See who won, then go again.

How to beat your friend at Sun & Moon

Pairs first

Two of a kind side by side force the other kind on both ends. Sweep the grid for pairs before anything else.

Mind the gaps

Sun, empty, sun: that gap must be a moon. These are the fastest squares on the board.

Count the lines

When a row has all three of one kind, the rest fill themselves. Finish lines as soon as they’re forced.

A full bar isn’t a win

Their bar counts filled squares, right or wrong. Only a correct grid ends the race.

Why Sun & Moon is made for 1v1

Sun & Moon is a binary logic puzzle in the family of Takuzu and Tango: suns and moons in balance, never three in a row, with = and × signs to follow. Head to head it rewards a fast eye for the forced squares, because a good solver barely guesses at all.

Every Sun & Moon 1v1 gets its own freshly made grid with exactly one solution, and both players get the identical givens and signs. The finished grid is checked on our server, and the time is measured there from the shared start, so a win is a real win.

Races are live. Send the link, keep the page open, and the moment your friend opens it you both get the same 3-2-1. If someone leaves mid-race or stops playing, the other player wins, and either of you can call a rematch in one tap. It is free, it runs in any browser, and nobody needs an account: just a name.

Prefer to play alone? Today’s daily Sun & Moon is the same for everyone, with its own leaderboard and streak.

Sun & Moon 1v1 questions

Can I play Sun & Moon against a friend online?

Yes. Tap “Challenge a friend”, send the link by WhatsApp, text or any app, and your friend gets the exact same grid. Keep the page open: the race starts the moment they open it.

How is the winner decided in Sun & Moon 1v1?

The first player to fill the grid correctly wins. Times are measured on our server from the shared start.

Can I use hints in a race?

No, hints are off in 1v1 so it stays fair. Undo and Clear still work.

Does a 1v1 match use the daily Sun & Moon?

No. Matches use their own fresh grids, so racing never spoils today’s daily or touches your daily streak.

Is Sun & Moon 1v1 free?

Yes, completely free in your browser on phone or computer. No download and no account: your friend just opens the link, picks a name, and plays.

More 1v1 games

Think you can beat your friends? Prove it.