Yes. The sheets, the boards on the site and the archive are free, without an account and without advertising. The PDFs are made once a day and anyone may download them.

How many puzzles are there a day?

One new board a day at each level — 6 × 6, 8 × 8, 10 × 10, and 12 × 12 — the same for everybody, dealt at midnight UTC. Earlier days stay downloadable in the archive below.

Do I need to sign up?

No. Every sheet downloads without an account. An account only keeps your online plays and your streak in one place across your devices.

Does every puzzle have exactly one solution?

Yes. Every board is checked to have a single solution and to be solvable by reasoning alone — no guessing is ever needed. The solution is not printed; the sheet holds the puzzle and the rules.

May I hand the sheets out or use them in a classroom?

Yes — print, photocopy and hand them out as you like, for a class, a club or a waiting room. Only leave the credit line at the foot of the sheet where it is.

Binario

Printable Binario puzzles

Binario — a binary puzzle that other publishers call Binairo or Takuzu — is a board of zeros and ones. Fill in the missing digits so that every row and every column holds as many of one as of the other, nowhere three alike stand side by side, and no two rows and no two columns are the same. A few digits are given at the start; the rest is the puzzle.

Every day there is a new board in each of four sizes, dealt to everybody alike and solvable without a single guess. Pick a size, print the sheet, and take it wherever a screen would not go — a pen is all it takes.

Today’s sheets

A4, black and white, one puzzle a sheet, with how to play on the last page. No sign-up, nothing to fill in.

6 × 6PDF 8 × 8PDF 10 × 10PDF 12 × 12PDF

A new set every day at midnight UTC.

Stuck on a sheet? How to solve Binario →

Compose your own sheet All printable puzzles 200 boards on Etsy

More than one at a time

Binary Puzzles to Print: 200 Boards, Easy to Hard

200 puzzles that start gentle and end hard · four to a page for printing, or one to a page for a tablet · A4 and US Letter in one purchase · answers in a separate file · every board also playable online

Etsy

Enter the code SLOWSQUARES at checkout for 25% off in our Etsy shop.

The sheet above stays free, and so does the new one dealt every day.

How to play

Fill every empty cell with a hollow square or a filled one, so that each row and each column holds as many of one as of the other.

Never three alike side by side — not in a row, not in a column.

No two rows read the same, and no two columns do either.

Tap a cell for a hollow square, tap again for a filled one, once more to clear it.

Shown in red: three of the same kind side by side, squares a row or column has too many of, and two lines that read the same.

Example: a solved 6 × 6 board.

Solving techniques →

Questions people ask

Is it free?: Yes. The sheets, the boards on the site and the archive are free, without an account and without advertising. The PDFs are made once a day and anyone may download them.
How many puzzles are there a day?: One new board a day at each level — 6 × 6, 8 × 8, 10 × 10, and 12 × 12 — the same for everybody, dealt at midnight UTC. Earlier days stay downloadable in the archive below.
Do I need to sign up?: No. Every sheet downloads without an account. An account only keeps your online plays and your streak in one place across your devices.
Does every puzzle have exactly one solution?: Yes. Every board is checked to have a single solution and to be solvable by reasoning alone — no guessing is ever needed. The solution is not printed; the sheet holds the puzzle and the rules.
May I hand the sheets out or use them in a classroom?: Yes — print, photocopy and hand them out as you like, for a class, a club or a waiting room. Only leave the credit line at the foot of the sheet where it is.

Earlier days

No timer. Leave and come back — it’s saved.

Play today’s Binario online