Binary Puzzles — 8x8

Free printable 8x8 binary puzzles in PDF with answer pages. Four 0s and four 1s per line, longer chains than 6x6. No sign-up.

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Moving from 6x6 to 8x8 changes the puzzle more than the extra two rows suggest. Each line now needs four of each digit rather than three, so the counting shortcut fires later and you have to lean harder on the no-three-in-a-row rule to make early progress. This is also the first size where the duplicate-line rule genuinely helps rather than just catching mistakes: comparing a nearly finished row against a completed one will often fill the last two cells outright.

Each page carries one 8x8 binary grid with given digits set in a heavier weight than the surrounding rule lines, so the puzzle reads cleanly even part-filled. Cells are sized for comfortable handwriting. Every puzzle is paired with an answer page showing the finished grid. Black and white, one puzzle per US Letter page.

Binary Puzzles 8x8 Easy 01 Binary Puzzles 8x8 Easy 01Download PDF ↓ Binary Puzzles 8x8 Easy 02 Binary Puzzles 8x8 Easy 02Download PDF ↓ Binary Puzzles 8x8 Easy 03 Binary Puzzles 8x8 Easy 03Download PDF ↓ Binary Puzzles 8x8 Easy 04 Binary Puzzles 8x8 Easy 04Download PDF ↓ Binary Puzzles 8x8 Easy 05 Binary Puzzles 8x8 Easy 05Download PDF ↓ Binary Puzzles 8x8 Easy 06 Binary Puzzles 8x8 Easy 06Download PDF ↓ Binary Puzzles 8x8 Easy 07 Binary Puzzles 8x8 Easy 07Download PDF ↓ Binary Puzzles 8x8 Easy 08 Binary Puzzles 8x8 Easy 08Download PDF ↓ Binary Puzzles 8x8 Easy 09 Binary Puzzles 8x8 Easy 09Download PDF ↓ Binary Puzzles 8x8 Easy 10 Binary Puzzles 8x8 Easy 10Download PDF ↓

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Frequently asked questions

How does the no-duplicate-rows rule actually help me solve?
Once a row is complete, scan the unfinished rows that match it everywhere except two blank cells. Those blanks cannot be filled the same way as the completed row, so if only one of the two possible fillings differs from it, that filling is forced. The same works on columns.
Do I have to use the duplicate rule, or is it just a constraint?
On easier puzzles you can often finish without it. From 8x8 upward, constructors frequently build in at least one step where it is the only route forward, so it is worth checking whenever the pair and gap patterns dry up.
How long does an 8x8 binary puzzle take?
Usually five to twelve minutes for someone comfortable with 6x6 grids. The opening is fast, the middle is where most of the time goes, and the final quarter tends to collapse quickly once one line completes.
What if I fill a cell wrongly — is it recoverable?
Usually, if you work in pencil and mark forced cells with a small dot. An error normally surfaces as three in a row or an impossible count within a few moves, so the damage is local. The answer page is there if you want to check a single cell rather than the whole grid.