Slow Squares Printables 6
Sudoku: 200 Puzzles to Print, 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
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.
Warm-up
Boards 1–24
- 9 × 938 digits given, and “Scanning for hidden singles” finishes every board: wherever a digit has only one cell left to it in a box, a row or a column, it goes there. Nothing else is needed.
Easy
Boards 25–64
- 9 × 934 digits given. On every board scanning finds all but one or two of the rest, and those one or two need “Naked singles”: a cell whose row, column and box already hold eight different digits takes the ninth.
Medium
Boards 65–108
- 9 × 928 digits given, and “Naked singles” three to five times a board; scanning does the rest. Nothing else is needed.
Medium-hard
Boards 109–156
- 9 × 926 digits given, and a new move on every board: “Pointing pairs”, once on 27 of the 48 and twice on the other 21. When the cells left to a digit in a box all lie in one row or column, the rest of that line cannot take it.
Hard
Boards 157–200
- 9 × 921 to 26 digits given, and “Pointing pairs” three to eight times a board, three or four times on 34 of the 44. Still nothing the how-to-play page does not teach.
Each name in quotation marks is a chapter of Sudoku’s how-to-play page, worked through step by step on a grid with only a few digits in it:
What is inside
- Sudoku200
- Kakuro3
- Suguru3
A look inside
The first board of four of its stages, gentlest first, drawn exactly as the file prints them.
- 9 × 9
- 9 × 9
- 9 × 9
- 9 × 9
Find a board
Every board here is numbered, 1 to 206. Type a number to see that board, and its answer when you want it.