FGP Sudoku is a classic number-placement puzzle game playable in your browser. This logic-based challenge tasks you with filling a 9x9 grid so that each row, each column, and each of the nine 3x3 subgrids contain all of the digits from 1 to 9.
Using your mouse and keyboard, you'll deduce the single correct solution for each puzzle.
The core of Sudoku is pure logic, not mathematics. You use a process of elimination based on the numbers already present on the grid. Each puzzle has only one unique solution.
To solve it, you must analyze the constraints of every row, column, and 3x3 box.
For example, if a particular row already contains the digit '7', no other cell in that row can be a '7'. By applying this same rule to all columns and boxes simultaneously, you can systematically determine the correct placement for every missing number.
FGP Sudoku provides a clean interface to test your deductive skills.
FGP Sudoku includes multiple difficulty settings, making it accessible for both beginners and experienced players. The difficulty is determined by the quantity of numbers provided at the start. 'Easy' puzzles give you many clues, allowing for a straightforward solving process.
'Hard' or 'Expert' puzzles provide very few starting digits. These require more advanced strategies, such as using the 'notes' feature to pencil in potential candidates for each cell. Starting on an easier level helps you learn the fundamental patterns before tackling the tougher challenges.
You can play FGP Sudoku for free directly in your web browser without any downloads or installations. As an HTML5 game, it's lightweight and compatible with most devices, including PCs and Chromebooks.
It's an ideal choice for a quick mental exercise, as it often works on school and work networks where other games might be restricted.
The goal in FGP Sudoku is to fill the 9x9 grid with numbers so that every row, every column, and every 3x3 subgrid contains the digits 1 through 9 without any repetition.
Use your mouse to click on an empty cell to select it. Then, either press a number key on your keyboard (1-9) or click a number on the in-game keypad to place it in the selected cell.
Begin by scanning the grid for rows, columns, or 3x3 boxes that are already mostly full. Use the given numbers to deduce what must go in the empty squares. Filling in one number often creates new opportunities to place another.
If you're unsure about a cell, you can use the 'notes' or 'pencil' mode. This allows you to place small 'candidate' numbers in a cell to help you track possibilities without committing to a final answer.
Scan First - Before making a move, do a quick scan for the number that appears most often on the grid. This usually provides the easiest starting points. Cross-Hatching - Focus on a single 3x3 box and identify a missing number.
Then, scan the intersecting rows and columns to eliminate cells where that number cannot go, narrowing down its potential location within the box. Use the Notes Feature - Don't try to hold all the possibilities in your head.
Actively use the pencil/note mode to mark potential candidates in a cell. This makes it easier to spot patterns and logical next steps. Look for Singles - Regularly search for "naked singles," which are empty cells where only one number is possible.
This is the most fundamental way to solve the puzzle. Avoid Guessing - Sudoku is a game of certainty and logic. A single wrong guess can create a cascade of errors.
If you get stuck, it's better to re-examine what you already know rather than taking a random shot.
