Sharpened Pencil — 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.

Where sudoku stops being a scanning exercise. These grids can't be finished by singles alone — you'll need naked pairs and pointing pairs, which means keeping honest pencil marks and reasoning about where a digit can't go. Bring a system.

What you get

• 100 puzzles, each with 25 to 30 starting clues
• Guaranteed unique solutions, confirmed by exhaustive search on every single grid
• Graded by technique. Every puzzle in this pack genuinely requires pair logic — verified individually, not estimated from the clue count.
• 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.

How it plays in the Studio

Pencil-mark notes are essential here, and the Studio clears a candidate from every peer cell automatically when you commit a digit. Live duplicate highlighting catches contradictions early, and a row, column or box turns green the moment it is complete and correct.

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.