Snake Sudoku

Snake Sudoku keeps the rows and columns of classic sudoku and throws out the nine 3x3 boxes. In their place: nine winding serpents that coil across the grid. Every technique you know still applies — you just have to learn to see the regions again.

It is built for people who finished being challenged by ordinary sudoku a long time ago.

THE SERPENT VAULT A library of hand-checked boards across three tiers — Intense, Elite and Master. Every puzzle is guaranteed solvable by pure logic, so a board never asks you to guess. Filter by difficulty, see the serpent shape before you commit, and keep your best time on each one.

THE DAILY SERPENT One fresh board a day, rated and shared by everyone playing. Build a solving thread and see how long you can keep it alive.

A BOARD BUILT FOR REAL SOLVING Pencil marks with an auto-fill option, undo and redo, an eraser, and an optional mistake highlight you can switch off entirely if you would rather work without a safety net. A timer you can hide. Digit counts on the number pad so you can see what is left.

THE ASCENT Your solving is rated, and the rating moves with the difficulty you actually clear. Track your fastest solve, your clean solves, your hint-free run and your longest daily thread. Climb from Adder to Viper and beyond, and see where you stand on the Top 30.

DUELS Challenge another player to the same board and settle it on the clock.

THE CODEX A plain-language guide to solving on serpent regions — naked and hidden singles, locked candidates, and the pattern work that the coil makes harder than a box ever did.

ONE PURCHASE, THAT IS ALL You buy Snake Sudoku once. There are no adverts, no subscriptions, no in-app purchases, and nothing is held back behind a second payment. Future puzzle packs are included.

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