# How to Use the Sudoku Builder — User Guide | PuzzleBuilder > URL: https://puzzlebuilder.co/docs/how-to-use-the-sudoku-builder/ Step-by-step guide to creating a Sudoku puzzle with PuzzleBuilder. Learn how to choose difficulty levels, customize the grid design, download print-ready files, and publish online games with a live leaderboard. --- ## How to Use the Sudoku Builder This guide walks you through everything you need to know about creating a Sudoku with PuzzleBuilder — from choosing the right Sudoku type and difficulty to styling the grid, printing your cards, and publishing your puzzle online. ### 1. Getting Started When you open the Sudoku Builder for a new puzzle, a dialog first asks you to choose your **Page Size** and **Orientation**. Pick the format that matches how you plan to use the puzzle — a 5×7 card for table settings, US Letter or A4 for worksheets, or a large poster for display. You can change this at any time later from the **Size** tab. A default template is applied automatically, so your artboard starts with a designed layout rather than a blank page. The left panel opens on the **Puzzle** tab, where you'll set up your Sudoku. ### 2. Choosing Your Sudoku Type The **Type** dropdown at the top of the Puzzle tab offers seven Sudoku variants. A short description under the dropdown explains the rules of the selected type: - Classic Sudoku (9×9): The standard puzzle — a 9×9 grid with 3×3 boxes. Each row, column, and box contains the digits 1–9 exactly once. - Mini Sudoku (6×6): A 6×6 grid with 2×3 boxes. Each row, column, and box contains the digits 1–6 exactly once. The friendliest entry point for kids and quick games. - Large Sudoku (16×16): A 16×16 grid with 4×4 boxes. Each row, column, and box contains the symbols 1–16 exactly once. A serious challenge for dedicated solvers — and a striking centerpiece at poster sizes. - Diagonal Sudoku: Classic 9×9 rules, plus both main diagonals must also contain the digits 1–9 exactly once. - Jigsaw Sudoku: A 9×9 grid where the usual 3×3 boxes are replaced by nine irregular regions. Each row, column, and region contains the digits 1–9 exactly once. - Killer Sudoku: A classic 9×9 grid plus dashed cages: the digits in each cage add up to the cage's clue and don't repeat within the cage. Combines Sudoku logic with arithmetic. - Letter Sudoku: A 9×9 classic grid using letters instead of digits — each row, column, and box contains each letter once. A fresh twist for word lovers, and an accessible option for younger players who aren't comfortable with numbers yet. Not sure which to pick? Classic is the safe choice for a mixed crowd, Mini works best for children, and Killer or Expert-level variants suit puzzle enthusiasts who want a real challenge. ### 3. Choosing the Difficulty Below the type, the **Difficulty** selector controls how many cells come pre-filled — the fewer the given cells, the harder the solve: - Easy: More given cells — great for beginners. - Medium: A balanced number of clues. - Hard: Fewer clues — for experienced solvers. - Expert: The fewest clues — maximum challenge. For events with a mixed group — a wedding table, a party, a classroom — Easy or Medium keeps everyone engaged. Save Hard and Expert for audiences who solve Sudoku regularly. ### 4. Generating Your Puzzle Once you've chosen a type and difficulty, click **Generate**. PuzzleBuilder creates a valid Sudoku with a unique solution and places the grid on your artboard. The panel confirms the result — for example, _"30 clues given"_ — so you can see exactly how many cells are pre-filled. Want a different grid? Click **New Puzzle** to generate a fresh variation with the same type and difficulty settings. Every click produces a brand-new puzzle, so you can keep generating until you're happy — or create several different puzzles for multiple tables by saving each one separately. Changing the type or difficulty and regenerating replaces the current grid, so settle on your settings before fine-tuning the design. ### 5. Styling the Sudoku Grid Click the grid on the canvas to select it, and the **Style & Content** panel on the right shows everything you can customize: - Cell backgrounds: Two alternating background colors give the blocks a subtle checkered contrast — or set both to white for a clean, minimal look. - Inner lines: The color and thickness of the thin lines between individual cells. - Block / region lines: The color and thickness of the heavier lines separating the boxes (or the irregular regions in Jigsaw Sudoku). - Outer frame: The color and thickness of the border around the whole grid. - Numbers: The color, size, and font family of the digits (or letters) in the grid. Below the grid styles, the same panel offers standard element controls: exact **width and height** (with a lock to keep the grid square), **flip**, **rotate**, and **Align to Page** buttons to position the grid precisely on your card. A practical tip: match the grid's line and number colors to your template's palette. A dark navy grid on a soft floral card looks intentional; the default colors work beautifully, but two clicks can make the puzzle feel fully custom. ### 6. Showing and Hiding the Solution The **Answers** toggle in the top toolbar shows or hides the solved grid on the artboard — the solution values appear in a distinct color so you can tell them apart from the given clues at a glance. Because downloads capture the artboard exactly as it appears, this also gives you an easy way to produce a solution sheet: download your puzzle with Answers hidden, then toggle Answers on and download a second copy. Print the solved version for yourself so you can settle disputes at the table. ### 7. Page Size and Orientation The **Size** tab lets you change the page size and orientation at any time — from 5×7 cards and US Letter or A4 worksheets up to 30×42 inch posters, plus the full A-series range. Your design isn't lost when you switch: the layout is automatically re-fitted to the new size, though you may want to fine-tune element positions afterward. See [the complete guide to designing print-ready puzzle cards](https://puzzlebuilder.co/docs/the-complete-guide-to-designing-print-ready-puzzle-cards/) for size recommendations by use case. ### 8. Templates The **Templates** tab offers ready-made designs you can apply with one click. Applying a template replaces the decorative elements — background images, title texts, frames — while your Sudoku grid and any elements you've added yourself stay untouched. A confirmation dialog explains exactly what will change before anything is replaced. ### 9. Layers and Adding Elements The **Layers** tab lists every element on your artboard and lets you reorder them by drag and drop. From the New Element bar you can add **Text**, shapes (**Rectangle**, **Triangle**, **Circle**, **Line**), decorative **Swash** flourishes, your own **Images**, and **Graphics** from the built-in library — perfect for adding the couple's names, the event date, or a short instruction line above the grid. Elements that came with the template and are marked as hideable can be hidden with the eye icon — hidden elements don't appear in downloads or in the published online version. ### 10. Saving Your Work Give your puzzle a name in the field at the top of the builder and click **Save**. Saving stores your Sudoku settings, the generated grid, your design customizations, and every element on the artboard. You can come back and continue editing at any time from My Puzzles. ### 11. Downloading Your Sudoku Click **Download** in the top toolbar to export your puzzle exactly as it appears on the artboard. Three formats are available: - PNG Preview: A low-resolution image for quick previews and sharing. - PNG High-Quality: A high-resolution image suitable for printing. - Print Ready PDF: A print-quality PDF for professional results. Downloading is available on all paid packages. For paper choices, home-printing settings, and print-shop tips, see the [printing guide](https://puzzlebuilder.co/docs/printing-guide-how-to-print-your-puzzles/). ### 12. Publishing Your Sudoku Online Click **Publish** to make your Sudoku playable online. You'll get a unique public link to share — optionally protected with a password — and you can enable scoring and a live leaderboard. This turns your Sudoku into a head-to-head race: everyone solves the same grid on their own phone, and the leaderboard shows exactly who's fastest. Players tap a cell and enter a digit (or letter, in Letter Sudoku) to fill the grid. Each player gets three hints for the whole game — using one reveals a cell, at the cost of points. The final score is based on accuracy, completion time, and hints used, so careful, fast solvers rise to the top. For the full details on publishing, sharing, scoring, and managing the leaderboard, see [How to Use Online Play and Leaderboards](https://puzzlebuilder.co/docs/how-to-use-online-play-and-leaderboards/). ### 13. Tips for a Great Sudoku - Match difficulty to your audience: Easy or Medium for mixed groups and events; Hard or Expert only when you know your solvers. - Use Mini Sudoku for kids: The 6×6 grid is genuinely solvable for younger players — and Letter Sudoku works well for early readers. - Go big for events: A Large Sudoku on a 24×36 or 30×42 inch poster near the entrance makes a striking, collaborative centerpiece. - Print a solution copy: Toggle Answers on and download a second copy so you can verify winners on the spot. - Create multiple grids: Generate a few different puzzles at the same difficulty and give each table its own — same challenge, no copying. - Pair it with a duel: Publish the puzzle online and challenge friends to the same grid — the leaderboard settles who's fastest. For more ideas, read why Sudoku puzzles make surprisingly great party activities. ### Need Help? If you have any questions or run into any issues while using the Sudoku Builder, contact our support team through the [Support page](https://puzzlebuilder.co/support/?contact). #### All Documents - How to Use the Crossword Builder - How to Use the Word Search Builder - How to Use the Number Hunt Builder - How to Use the Photo Challenge Builder - How to Use the Bingo Challenge Builder - How to Use the Sudoku Builder - How to Use the Spy Challenge Builder - How to Use Online Play and Leaderboards - Printing Guide - How to Print Your Puzzles - How to Use the AI Clue Generator - The Complete Guide to Designing Print-Ready Puzzle Cards - How to Create Engaging Classroom Puzzles for Any Subject [← Back to Support](https://puzzlebuilder.co/support/) ### Ready to make your event unforgettable? Open the editor and build your first puzzle in minutes. You only pay when you're ready to download or publish — and every purchase is covered by a 14-day refund. 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