Look Inside Is Already Split. White Holds Odd. Gray Holds Even.
Shoppers skip another 9×9 in Look Inside. They stop when gray and white already split the grid.
Gray means even. White means odd. Next-door cells are opposite colours, so one is odd and the other is even. That extra rule is what the shopper sees before they read a given.
If your last Sudoku title was another classic 9×9, this is a whole even-grid book that looks different in Look Inside.
The Colour Is on the Page So They Do Not Call It a Misprint
A page can have exactly one fill and still stop a reader who works it the ordinary way. They conclude the book is misprinted. Checkerboard keeps the usual row, column, and box uniqueness, then adds a colour they can see: odd on white, even on gray. That extra check is on the printed page.
Every puzzle comes with its solution image. Ready for the solutions section in the back of the book, or for the answer key on the desk when you print a class set.
The Next Title on the Shelf Is the Gray-and-White Even Grid
Puzzle book publishers. A variation chapter, or a whole even-grid title. One-time commercial-use license. Watermark-free books, worksheets, and printable packs you can sell on KDP, Etsy, Teachers Pay Teachers, or your own store.
Worksheet packs and class sets. Fast finishers need a second sheet you already have. Print a 6×6 Very Easy for the students still working and an 8×8 or 10×10 for the ones already done. Same odd/even rule. No new lesson plan. Pick the level that matches the energy in the room.
Publishers who already own Puzzle Maker Pro. You already run Instant Puzzle Books. In Sudoku Variations, pick an even size first. Checkerboard then appears on the Variation list. The page you print is still odd on white and even on gray.
Six Even Sizes. Levels That Match the Grid.
Pick 6×6, 8×8, 10×10, 12×12, 14×14, or 16×16. Checkerboard is even-grid only.
6×6 is the starter print-off: Very Easy and Easy. 8×8 goes to Normal. 10×10 and larger can go to Tough and Extreme.
Tint the gray so Look Inside still reads as this title. Pick the size, then the level that size allows.
Numbers First. Letters, Roman, or Hex When You Want a Second Look.
Default is numbers, so the odd and even rule stays obvious.
Letters, Roman numerals, or hex still follow the same odd and even rule. Keep numbers when the odd/even rule must stay obvious. Use letters, Roman, or hex when the catalog needs a second even-grid look on the same rule.
From One Puzzle Image to a Book You Can List
Set a quantity. Each puzzle comes back with its solution image, ready for the solutions section in the back of the book.
Export JPG, PNG, transparent PNG, or SVG at 300 dpi and compile how you want. Instant Puzzle Books turns those images into the interior at your trim, with a title page, contents, page numbers, and a footer that points each puzzle at its solution. Export that book as an interactive PDF book and the contents and those puzzle-to-solution links become clickable.
Puzzle Book Studio is on this product. Instant Puzzle Books and Puzzle Book Studio both produce interactive PDF books.
Set 6×6 Easy for one file and 10×10 Extreme for the next. Same odd/even rule. Same gray. Save the Creator preset once (gray cells, font, lines).
Try It Before You Buy
Puzzle Maker Pro has a free demo. Demo output is watermarked, one puzzle at a time. Paid files are watermark-free.
Getting started: Getting started with Checkerboard Sudoku.
What Ships With Checkerboard Sudoku
Checkerboard Sudoku is what this page sells: Instant Puzzle Books and Puzzle Book Studio. Interactive PDF books come from either book builder.
You can add other Puzzle Maker Pro products later.
Licensing and Commercial Use
Checkerboard Sudoku lets you sell the finished books, worksheets, and printable packs you make to your own readers and customers, on KDP, Etsy, Teachers Pay Teachers, or your own store. One-time commercial-use license. Watermark-free files.
Product Details
| Product | Puzzle Maker Pro – Checkerboard Sudoku |
| Platform | Windows desktop |
| Internet required | No |
| Rule | Even grids. White cells hold odd digits. Gray cells hold even digits. Row, column, and box uniqueness still apply |
| Sizes | 6×6, 8×8, 10×10, 12×12, 14×14, 16×16 |
| Difficulty | Follows the size. 6×6: Very Easy and Easy. 8×8 adds Normal. 10×10 and larger can reach Tough and Extreme |
| Symbols | Numbers (default), Letters, Roman numerals, Hexadecimal |
| Quantity | 1 to 5000 |
| Output formats | JPG, PNG, transparent PNG, SVG |
| Solution pages | Yes, a solution image generated with every puzzle |
| Puzzle books | Instant Puzzle Books; Puzzle Book Studio (this one collection); title page, table of contents, solution cross-references; interactive PDF books from Instant Puzzle Books or Puzzle Book Studio |
| Upgrades | You can add other Puzzle Maker Pro products later |
| Commercial license | Sell the finished books, worksheets, and packs you make to your own readers and customers |
| Free demo | Yes |
| Delivery | Immediate, in your member area |
Questions Before You Buy
Is there a free demo?
Yes. Puzzle Maker Pro has a free demo. Demo output is watermarked, one puzzle at a time.
Can I add more later?
Yes. Start with Checkerboard Sudoku. Other Puzzle Maker Pro tools can be added after you buy.
How does Checkerboard Sudoku work?
Same Sudoku uniqueness in every row, column, and box, plus one colour rule: white holds odd, gray holds even. Neighbouring cells have opposite colours, so one is odd and the other is even.
Which sizes can I print?
Checkerboard runs on even sizes: 6×6, 8×8, 10×10, 12×12, 14×14, and 16×16. Pick the size that matches the book.
Do the levels match the grid?
Yes. 6×6 stays on Very Easy and Easy. 8×8 can reach Normal. 10×10 and larger can reach Tough and Extreme. Pick the level that matches the mood of the page.
Can I print letters or Roman numerals?
Yes. Letters, Roman numerals, and hex keep the same odd/even rule. Numbers keep that rule obvious.
Does every puzzle come with a solution?
Yes. Every puzzle writes a solution image.
Can I sell the finished books and worksheets I create?
Yes. Checkerboard Sudoku lets you sell the finished books, worksheets and printables you make to your own readers and customers.
Do I need the internet to generate?
No. Generation runs offline on Windows.
Six Months From Now the Even-Grid Book Is on the Shelf Next to Classic 9×9
Another 9×9 interior disappears in Look Inside. A gray-and-white even grid does not. Set the size. Set the gray. Instant Puzzle Books staples the interior.
Try the free demo, then pick Checkerboard Sudoku at the top of this page.
Checkerboard Sudoku is even-grid only: 6×6, 8×8, 10×10, 12×12, 14×14, or 16×16. White holds odd, gray holds even. Matching solution image, Instant Puzzle Books. Try the free demo.
