Jigsudo

Jigsudo is a browser-based logic game with six stages: Memory, Jigsaw, Sudoku, Peaks & Valleys, Number Search, and The Code. You complete them in order, using what you uncover or build in one stage to move into the next. Sudoku sits at the center of the game, but solving its grid is only part of the challenge.

HOW TO START A JIGSUDO PUZZLE

Choose Daily to take on the day's challenge, or select Custom to set up a puzzle with your preferred difficulty and stages. The available difficulty levels are Easy, Normal, Hard, and Extreme. If this is your first game, follow the stages in order to see how the board comes together.

THE SIX STAGES, EXPLAINED

From Hidden Pieces to a Solved Grid

Memory: Turn over cards and remember where the matching Sudoku blocks appear. Finding pairs reveals the pieces you need for the board.
Jigsaw: Place those pieces in their correct positions to rebuild the 9×9 grid.
Sudoku: Fill the reconstructed grid using Sudoku logic. Each row, column, and 3×3 box must contain the numbers 1 through 9 without repeats.

Three More Ways to Read the Board

Peaks & Valleys: Compare numbers with their neighboring cells to identify local highs and lows.
Number Search: Look through the completed grid for hidden number sequences.
The Code: Watch the final number pattern, then repeat it to complete the challenge.

The order matters: Memory supplies the pieces, Jigsaw creates the grid, and Sudoku fills it. The last three stages then ask you to examine that completed board in different ways.

TIPS FOR EACH PART OF THE CHALLENGE

During Memory, keep track of cards you have already revealed instead of turning over new ones at random.
During Jigsaw, check how the numbers and block boundaries fit before placing a piece.
During Sudoku, use the given numbers to rule out possibilities in a row, column, or 3×3 box.
During Peaks & Valleys, compare a candidate number with its neighbors before selecting it. Accuracy matters because mistakes can reduce your rank points.

DAILY PUZZLES AND YOUR PROGRESS

A new Daily board arrives at 06:00 UTC. You can revisit earlier puzzles through History, but completing the current day's challenge is what counts toward your daily streak and global ranking. An account also lets you save your progress across devices and appear on the leaderboard.