▪ King-Size Sudoku ▪ 16 × 16 ▪ Advanced Variants ▪

Master
the Grid

King-Size 16×16 Sudoku – More Rows, More Columns, More Challenge.

Classic Sudoku uses digits 1–9 in a 9×9 grid. King-Size Sudoku scales to a full 16×16 board, requiring digits 1–16 in every row, column, and 4×4 box. The result is a dramatically deeper strategic challenge — more constraint propagation, longer solving chains, and genuine satisfaction when the grid finally clicks into place.

16 × 16 Grid Digits 1 – 16 4 × 4 Box Regions Killer Sudoku Variants Printable PDFs
▶ Today's Puzzle Download Free PDFs
// The Format

Why King-Size?

We focus exclusively on 16×16 Sudoku — because that's where the real depth begins.

⊞

256 Cells. 16 Symbols.

Every row, column, and 4×4 box must contain each digit from 1 to 16 exactly once. The expanded symbol set forces solvers to track far more interdependencies simultaneously.

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Strategic Depth

Techniques that trivially solve 9×9 puzzles — naked pairs, hidden singles — become intricate multi-step chains in a 16×16 grid. Every move carries more consequence.

◻

Killer Variant Incoming

Our specialty is King-Size Killer Sudoku: caged regions with sum constraints layered onto the 16×16 base grid. It's the hardest widely-played Sudoku format in existence.

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Four Difficulty Tiers

From approachable Easy grids designed for newcomers to 16×16, all the way to Expert-level puzzles that will challenge even seasoned Sudoku veterans.

Property Classic 9×9 King-Size 16×16
Grid size81 cells256 cells
Symbols1 – 91 – 16
Box regions9 × (3×3)16 × (4×4)
Constraint count27 units48 units
Avg. solve time (easy)5 – 15 min20 – 60 min
Avg. solve time (hard)20 – 45 min60 – 180+ min
// Phase 1 – Active

Today's King-Size Sudoku

A fresh 16×16 puzzle every day. Print it, solve it, log your time.

Medium — —

Loading today's puzzle…

📅 Previous Puzzles

⏱ Timer

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📋 Puzzle Info

TypeKing-Size Sudoku
Grid16 × 16
Symbols1 – 16
DifficultyMedium
Puzzle ID—

🔢 About This Format

Each row, column, and 4×4 box must contain every digit from 1 to 16. No repeats. No guessing required — logic only.

← View all previous daily puzzles in the archive
// Phase 1 – Active

Download & Print

12 King-Size Sudoku grids, ready to print. Choose your challenge level.

// Phase 1 – Active

Puzzle Archive

Browse and download all past daily puzzles. Filter by date or difficulty.

Date Puzzle ID Difficulty Type Download
// Get in Touch

Contact

Questions, puzzle requests, or feedback — we'd love to hear from you.

We're building this for puzzle lovers.

Master the Grid is a passion project dedicated to King-Size Sudoku. Every puzzle is hand-verified for a unique solution.

✉ hello@masterthegrid.com
🐛
Report a puzzle error
Found a mistake? Let us know the puzzle ID.
💡
Request a variant
Want Diagonals? Irregular boxes? Ask away.
📦
Bulk PDF packs
Classroom or club use? We can prepare packs.
// Planned Feature Phase 2

Coming Soon: Play Online

An interactive, browser-based King-Size Killer Sudoku — 16×16, fully featured, no install required.

💡 Smart Hints — context-aware logical suggestions Soon
✏️ Pencil Marks — full notes mode per cell Soon
✔️ Auto-Check — instant conflict highlighting Soon
↩️ Undo / Redo — full move history Soon
⏱ Timer & Scoring — track your personal bests Soon
🔢 Killer Cages — sum constraints on the 16×16 grid Soon

🔔 Get Notified

Be the first to play when the online game launches.

Master the Grid — Online (Preview)
KILLER 16×16 • HARD ⏱ 00:00

Development Preview

The interactive Killer Sudoku engine is in active development. Sign up above to join the waitlist.