GIANT GRIDS
Giant Sudoku: 16×16, 25×25, 36×36 and 49×49 grids
Giant Sudoku expands the board without changing its principle. Every symbol appears once in each row, column and box. The new challenge comes mainly from scale.
Updated · AE Book Studio
Four sizes, four experiences
A 16×16 has 256 cells in 4×4 boxes. A 25×25 has 625 cells in 5×5 boxes. A 36×36 reaches 1,296 cells and 6×6 boxes. A 49×49 contains 2,401 cells in 7×7 boxes.
As the grid grows, visual scanning takes longer and notes matter more. One puzzle can fill an evening or several sessions.
Keep your place
Work by zones. Scan one symbol at a time, then each box, and mark where you stop. On the largest grids, a ruler can help track a row without drifting.
Do not write every possible candidate immediately; the page becomes unreadable. Start with the most constrained cells and update them often.
Printed format matters
A 25×25 or larger needs a full page. An 8.5 × 11 inch trim protects readability, but the grid remains dense. Strong box lines and crisp typography are essential.
Solutions must also be large enough for cell-by-cell checking. A tiny answer grid is of little use with 1,296 or 2,401 cells.
Where to begin
The 16×16 is the best bridge from classic Sudoku: more symbols, but boxes remain easy to isolate. A 25×25 becomes a long session. The 36×36 and 49×49 suit solvers seeking an unusual endurance challenge.
Sudoku Multiverse provides 40 16×16 and 20 25×25 puzzles alongside 160 classic 9×9 grids.
FAQ
Frequently asked questions
What is the largest format covered?
The 49×49, with 2,401 cells and forty-nine 7×7 boxes.
Do the rules change?
No. Every value appears once per row, column and box.
Which size should I try first?
A 16×16 is the most approachable step after 9×9.