Volume 1
Easy to Hard
Sudoku books, graded by how they are solved
The classic number puzzle, in normal print and large print, graded honestly from Easy to Hard.
What is classic sudoku?
Sudoku is a 9 by 9 grid split into nine 3 by 3 boxes. You place 1 to 9 so that every row, every column and every box holds each digit exactly once. Every puzzle in our books has exactly one solution, checked by computer.
How to solve it
- 1Look for a row, a column or a box that is nearly full.
- 2Find the digit that can only go in one place, and write it in.
- 3Each digit you place makes the next one easier to find.
- 4If you get stuck, try another puzzle and come back. The answers are at the back.
Levels
What Easy, Medium and Hard mean here
Our levels are set by the methods a puzzle needs, not by how many digits it gives you. A Hard puzzle is not simply an Easy one with digits taken away.
Easy
Every step is a cell with only one digit left, or a digit with only one place to go. Look, place a digit, look again.
Medium
The easy steps run out. To go on you need a new method, such as pairs or pointing.
Hard
Every puzzle needs at least one advanced method. Still solved by logic alone, and never by guessing.
The books
Classic Sudoku books
What is inside every book
- 100 puzzles, one to a page
- The classic 9 by 9 grid, with nine 3 by 3 boxes
- Levels graded by the solving methods each puzzle needs, not by how many digits it gives
- Answers at the back, with the digits you fill in printed lighter
- Every puzzle has exactly one solution, checked by computer
Questions
- What is the difference between Easy, Medium and Hard?
- The hardest solving method a puzzle needs. Easy needs only the simplest steps, Medium needs a method such as pairs or pointing, and Hard needs an advanced one. A computer solves every puzzle the way a person would, to set its level.
- Is there a large print sudoku?
- Yes. Every word and number is 16 point or more, and the digits are big and clear.
- Do the puzzles ever need guessing?
- No. Every puzzle can be solved by logic alone, and every one has exactly one solution.