Binary Signs Puzzles to Print: 200 Boards, Easy to Hard

What you get

• ·Three puzzle files: A4 and US Letter with four boards to a page, and one with a single board to a page for a tablet.
• ·The answers in a file of their own, so they never come out of the printer with the puzzles.
• ·Four boards to a page for printing, and a third file with one to a page — for a tablet, or for a board you can rest a hand on.
• ·Every board also playable on this site, with its answer a tap away.

How hard are they

Every board here was graded by the reasoning it actually needs, and a solver walked each one to the end before it was kept. None of them needs a guess, and none of them needs a rule you have not been told.

• 6 × 620, to start onthe moves you can see at a glance — a pair, a gap, a line with all of one digit, a sign with one end known — and, on every board, a sign read while both its cells are still empty: two cells joined by an =, next to a 1 in the line, can only be 0s.
• 8 × 860the same, and one to four times a whole line read at once — holding a row against every way it could still be filled, its signs included.
• 10 × 1072more of both: a whole line read four to thirteen times, and a sign between two empty cells two to eight times.
• 12 × 1248, at the backthe same moves, more of them: a whole line read eight to nineteen times.

What is inside

• Binary Signs200
• Binary3
• Binary Diagonals3
• Binary Blocks3

A look inside

The first board of each size, drawn exactly as the file prints it.

• 6 × 6
• 8 × 8
• 10 × 10
• 12 × 12