Sudoku — Learn While You Play

🌱 Beginner Challenge — Puzzle 1 of 20

00:00

Score: 0

Best time: —

Hints: 0

Mistakes: 0 ❤❤❤❤❤

👆 Tap a box, then tap a number below. Not sure? Turn on “Notes” to try small numbers first!

📘 What you’ll learn today ⬇

Main Rule: Each row, column, and box must have all numbers once. No repeats!
Easy Spot: If only one number fits in a box, that’s the answer.
Only Choice: In some rows/columns/boxes, only one cell can hold a number. That’s the right spot!

🎲 New Puzzle — Get a brand-new board. Pick your level first in “Choose Challenge.”
🔄 Restart — Start this same puzzle over from the beginning.
↩️ Undo — Go back one move. You can press it many times.
↪️ Redo — Go forward again if you undid something by mistake.
🧽 Erase — Clear the selected box. (You can’t erase the gray starter numbers.)
📝 Notes — Write tiny helper numbers in a box. Tap a number to add or remove it. Turn Notes off to place the big number.
💡 Hint — Show one helpful move. You get up to 5 hints each puzzle.
⏱️ Timer — Shows how long you play. You can Pause, Resume, or Stop.
🎯 Highlight — Tap a filled box or a number button to light up all of that number on the board.
🗑️ Clear Save — Delete all saved progress and scores. Use this only if you want to start fresh.
🗣️ Coach — Read messages here for tips, cheers, and warnings about mistakes.
❤️ Hearts — You have 5 hearts. A wrong number takes one heart. No hearts = Game Over.