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25×25 Shikaku puzzles
The 25×25 Shikaku is our biggest standard grid: 625 cells and around 70–120 numbers. It is a marathon for experienced solvers, and every puzzle is still guaranteed to have exactly one solution.
0 rectangles · Drag to draw · Tap a rectangle to erase · Ctrl+Z undo · H hint
Solving a 25×25 Shikaku
- Play on a large screen or zoom out your browser for comfort.
- Work outwards from the edges and corners.
- Prefer the monthly 25×25 challenge if you want to compare times with others.
New to the puzzle? Read how to play Shikaku and then the strategy guide.
25×25 Shikaku questions
How long does a 25×25 Shikaku take?
Most players finish a 25×25 Shikaku in about 40–90 minutes, depending on the difficulty level and experience. Your personal best and average times are saved in your browser.
How many numbers are in a 25×25 Shikaku?
It depends on the level. Easy puzzles use more, smaller rectangles; Hard puzzles use fewer, larger ones. Whatever the count, the numbers always add up to 625, the total number of cells.
Is every 25×25 puzzle solvable without guessing?
Yes. Every puzzle has exactly one solution, verified by our solver. Easy puzzles need only basic deductions; Hard puzzles may need longer chains of reasoning, but never a lucky guess.