Grandmaster — 100 Sudoku Puzzles | Puzzle Studio Pack

⚠️ Requires 7ThirtyWorld Puzzle Studio (sold separately). This is an expansion pack — a puzzle file that loads into the Studio app. It is not a standalone game and will not open on its own.

100 sudoku puzzles. Every one has exactly one solution, and that has been proved, not assumed.

The hard stuff. Singles, naked pairs and pointing pairs will get you partway into these grids and then stop working. Every puzzle in this pack demands a technique beyond that — the point where you stop filling cells and start eliminating possibilities in earnest.

What you get

• 100 puzzles, each with only 22 to 27 starting clues — the sparsest grids in the collection
• Guaranteed unique solutions. Every grid was solved exhaustively to prove exactly one answer exists. Sparse does not mean ambiguous.
• Graded by technique. These were selected precisely because the standard toolkit runs out on them. Nothing here is merely "fewer clues".
• All 100 grids are different, and different from every other pack in the collection
• Ordered gently — the pack opens with the most generous grids and works down.

Honest warning: this pack will beat you sometimes. That is the point of it.

How it plays in the Studio

Pencil-mark notes are effectively mandatory. The Studio clears candidates from peer cells as you commit digits, highlights duplicates live, and turns a row, column or box green the moment it is complete and correct. A Check button will confirm your work so far if you want it, at a score penalty.

How to load it

Open 7ThirtyWorld Puzzle Studio, choose Add a pack, and select this file — or just drag the file onto the app. It joins your library permanently and works completely offline.

Instant digital download. One pack file. 100 puzzles. Yours forever.