Step-by-step walkthroughs
Next to every logic puzzle's solution in our books is a QR code. Point your phone's camera at it and tap the link: you'll see that exact puzzle solved one step at a time, with the square, the number and the reason it has to go there.
Try it on this sample puzzle (not from any of our books). It's a tough one, so you can see the kinds of steps that come up in Hard puzzles too. Press Next to go one step at a time.
Blue digits are placed by the walkthrough. Red strike-through marks a candidate being ruled out. Cells are named by row and column: R3C5 is row 3, column 5. Arrow keys step too.
How to use them
Check one step, not the whole answer. Press Next until the walkthrough reaches the point where you got stuck. Stop there and carry on yourself.
Skip the easy parts. “Skip to next hard step” jumps straight to the move that unlocks the grid.
Learn as you go. Each step says what kind of step it is and explains it in a sentence. The same few ideas come up again and again.
Scanning the code
- Open your phone's camera and point it at the QR code. Tap the link that appears.
- No app to install and nothing to sign up for.
- Each walkthrough has its own private link that only the book gives you, so nobody stumbles on your answers.
- The code goes through a link service that counts scans (just the number, nothing about you), so we know the walkthroughs are useful. Privacy.