Puzzlekeys.blog

Sudoku is a logic-based number puzzle. The goal is to fill a 9×9 grid so that every row, every column, and each of the nine 3×3 boxes contains all the numbers from 1 to 9, with no repeats.

🧩 What a Sudoku looks like A big square divided into 9 rows × 9 columns Further divided into nine 3×3 subgrids (boxes) Some numbers are already filled in (these are your clues).

🎯 Objective Fill in the empty cells so that: Each row has numbers 1–9 (no duplicates) Each column has numbers 1–9 (no duplicates) Each 3×3 box has numbers 1–9 (no duplicates).

▶️ How to play (step-by-step) Look for easy spots Find rows, columns, or boxes that are almost full. Figure out which number is missing. Use elimination For an empty cell, ask: What numbers are already in this row? What numbers are already in this column? What numbers are in this 3×3 box? The missing number must be the one not used yet. Pencil in possibilities (optional) Lightly note possible numbers for tricky cells and narrow them down as you go. Keep scanning the grid Each number you place helps reveal others.

🧠 Simple example idea If a row has: 1, 2, 3, 4, 5, 6, 7, 8, _ The missing number must be 9.

💡 Tips for beginners Start with easy puzzles Don’t guess randomly—use logic Focus on one number at a time (e.g., place all the 5s) Take breaks if you get stuck.

In this website you place numbers into the cells by touching or clicking its buttons: