The Crossword Your Readers Rebuild Instead of Solve
Everyone recognizes a crossword grid. Almost nobody has seen this one. Block Fill hands your solver a full magazine-style crossword, densely interlocked, around sixty five words on the default board, sliced into twenty small squares and shuffled, and the whole puzzle is putting it back together. No clues, no trivia, no “I didn’t know that answer” dead ends, just the satisfying click of pieces snapping into a completed grid.
That one twist changes who can play. A standard crossword shuts out anyone who does not carry the answer in their head. Block Fill, known to Dutch publishers as Blokpuzzel, is a crossword nobody gets stuck on, because you rebuild it by matching letters and shapes rather than recalling facts. It is familiar enough to pick up in seconds and fresh enough to stop a shopper mid-scroll.
I have built a system that spans more than thirty puzzle types, and I have learned to spot the ones that earn a place on a shelf on sight. Block Fill is one of them: unmistakably a word puzzle, yet unlike anything else in the word aisle.
See a finished Block Fill page and its solution in the gallery above, or try the free demo and generate a few of your own before you spend a thing.
A Word Puzzle That Is Not Another Crossword or Word Search
Walk the word-puzzle shelf and it is crosswords, word searches, and more of the same. Block Fill gives you a word title that still reads as instantly approachable but plays like nothing beside it. The solver sees an empty grid with a few letters already placed, a tray of shuffled blocks, and one job: slot every block back so the grid reads as a full crossword again.
Because the challenge is reassembly, not recall, it reaches the readers a clue-based crossword turns away, the ones who love the look of a word grid but not the trivia. That makes Block Fill a strong headline title on its own and genuine variety inside a mixed word-puzzle book, where it breaks up page after page of the usual two or three types.
Everything You Can Build With Block Fill
One puzzle type stretches across more of your catalog than you would expect. Block Fill carries a standalone word title, a seasonal gift book, and a classroom word-work activity without ever repeating itself:
- Standalone Block Fill puzzle books for KDP and other print-on-demand platforms
- Seasonal and gift books styled to the occasion, with your own colours, fonts and borders
- Printable word-work sheets and activity packs for Etsy or your own site
- Mixed word-puzzle books that fold Block Fill in beside your other Puzzle Maker Pro types
- Progressive collections that climb from small grids to large ones with decoy blocks
- Browser-playable Block Fill puzzles that draw solvers to your own site, with the Interactive add-on
What a Finished Block Fill Page Looks Like
Before you build a book around a puzzle, you want to see exactly what your buyer will hold. The gallery shows it: the empty grid with its starter letters, the shuffled block bank beside it, and the completed crossword as a clean answer key. Every puzzle comes out with its matching solution in the same pass, and the SVG and PDF pages are vector, so one grid is crisp on a 6 by 9 page and the same grid holds up blown up for a large-print edition.
Try the free demo, generate a few Block Fill pages, and judge the output before you pick an edition.
Every Square Pulls Double Duty
Look closely at that solution grid, because this is where Block Fill earns its place. Every white square in it belongs to two words at once, one running across and one running down, the way a newspaper or magazine crossword is built. The grid is dense: black squares are the exception, the white run wall to wall, and the pattern reads the same when you turn the page upside down.
That density is the puzzle. Drop a block into place and its letters have to keep making words with every neighbour it touches, on all four edges, which is what turns a jigsaw into a word puzzle with only one way home. A loose grid of scattered words with white space between them gives the solver almost nothing to push against; a fully interlocked one makes every placement a deduction.
It is also what your reader sees first. A Block Fill page looks like a real crossword, because it is one, and that is the difference between a puzzle a shopper recognises as the genuine article and one that reads as a filler page.
Built on Unique Blocks, So Every Piece Has One Home
Nothing sinks a puzzle book faster than a page a solver cannot finish. Block Fill rests on one firm guarantee: every block in the bank is unique, so no two pieces are identical and a solver never faces two pieces that could both be right. A handful of letters sit on the grid from the start as anchors, and they are spread across the puzzle rather than bunched in one corner, so the solver gets a way in on more than one side of the page.
Want it harder? Add decoy blocks that belong nowhere and let the solver reason out which pieces are real. You tune it from a gentle warm-up to a grid that makes a solver work for it, and every page is designed to rebuild into one finished crossword.
The Crossword Fills Itself
Filling a crossword is the work nobody sees. Every white square has to be a letter in an across word and a down word at the same time, and one bad fit poisons the whole grid. Puzzle Maker Pro does that for you, every time, from the dictionary it downloads once and keeps. You never source a word, check a crossing, or repair a grid.
One setting decides how the finished crossword reads. Easy is the band to pick when your reader’s vocabulary is the constraint, so a children’s title, a word-work pack or a large-print line fills with words they already know. Regular is the general trade puzzle book: mostly familiar words, with a less common one where the interlock demands it.
So the choice is a page your reader finishes or a page that makes them think, and it is one click either way. On Block Fill Productivity, Time Saver runs both bands in the same pass, which is how a collection eases readers in over the opening pages and turns harder at the back.
From One Puzzle to a Whole Book
Making one Block Fill puzzle is satisfying. Making a hundred consistent ones is a product.
Every edition builds the book. Instant Puzzle Books takes the puzzles you just generated and the book settings you already publish in, and writes the whole interior: a title page, a table of contents, and a footer on every puzzle telling the reader exactly which page its solution is on.
Every edition also includes Puzzle Book Studio Creative, full book design on one collection, so you take the layout apart, rebuild it, and keep every page in the trim you ship.
Block Fill Productivity is the rung that turns this into a line. Time Saver runs several saved setups at once, each row carrying its own block size, anchor count, decoy count and difficulty, so one pass gives you the gentle opener, the mid-book climb and the stubborn finale. Full Puzzle Book Studio folds those sets, and your other puzzle types, into one spine. You build the recipe once and the pages keep coming.
Choose Your Edition
Both editions create and export real Block Fill puzzles with matching solutions, and both let you sell what you make. The difference is how fast you can produce.
Block Fill is the place to start, and it already makes books that look like yours rather than a generator’s: set a quantity, press once, and a run of puzzles comes out with a matching solution for every one, at any block size, anchor, decoy and difficulty setting. Print-ready PNG, JPG, SVG and PDF, and Instant Puzzle Books assembles the interior from the settings you already publish in. Set the entry font, the cell borders and the colour of the black blocks once, and every grid in every book you make carries the same look, at the weight a large-print line needs. Puzzle Book Studio Creative then gives you every book feature on the collection, fonts, titles, page numbers, layout, margins and trim size, so you design the interior instead of accepting a standard one. And Puzzle Slides turns the same set into a live round, the one export built for a drag puzzle: every block in the bank becomes a tile you can move on screen.
Block Fill Productivity is for filling whole books: Time Saver batch creation, Puzzle Book Studio Productivity for mixed books, JSON export for your own apps and workflows, and the right to supply the puzzles you generate to other publishers and sellers.
Add Interactive to either edition to publish playable Block Fill sets on your own website.
| Block Fill | Productivity | |
|---|---|---|
| Create Block Fill puzzles and matching solutions at every block size and count | ✓ | ✓ |
| Anchor hints, decoy blocks, and Easy or Regular vocabulary | ✓ | ✓ |
| Export as PNG, JPG, SVG and PDF | ✓ | ✓ |
| Instant Puzzle Books, with title page, contents and solution cross references | ✓ | ✓ |
| Full styling control over fonts, colours and borders | ✓ | ✓ |
| Puzzle Book Studio Creative, full book design on one collection | ✓ | ✓ |
| Puzzle Slides, an interactive PowerPoint round with movable block tiles | ✓ | ✓ |
| Time Saver, batch several complete sets in one pass | ✓ | |
| Puzzle Book Studio Productivity, mixed books from several collections | ✓ | |
| JSON export for your own apps and workflows | ✓ | |
| Sell the finished books, worksheets and packs you make to your own readers | ✓ | ✓ |
| Sell or supply the generated puzzles to other publishers and sellers | ✓ | |
| + Interactive on either edition: playable web games on your own site | ✓ | ✓ |
Teach It Live with Puzzle Slides (every edition)
The fastest way to sell a puzzle nobody has seen is to let a room solve one together. Export your set as Puzzle Slides and the same blocks you print become a live, interactive round: the grid goes up on the screen, every bank piece is a movable tile, solvers drag blocks into place, and you reveal the finished crossword at the end. It opens in PowerPoint, so there is nothing extra to install.
You decide where it runs. Walk a classroom or a word-club through their first Block Fill together on the projector, run it as a segment on a stream, or present it in a webinar and share the deck straight from the call. One generation gives you the printed page and the live round, so the set you built for the book works just as hard in the room.
Play It on the Web (Interactive add-on)
Most people have never played a Block Fill, and a description only goes so far. A grid they can actually rebuild does the teaching for you. Publish a set to your own site and a curious visitor drags blocks into the grid, watches the crossword come together, and feels the puzzle click, all before you have asked for anything. Nothing to install, no account: they just play.
Getting there is a copy-and-upload, not a coding project. You export the set and upload the ZIP to your WordPress site with the free BookPublisherTools plugin, and the hosted player runs your puzzles so readers solve them right in the browser, with nothing for you to maintain. You choose one of two presentations:
- A puzzle list. Visitors pick a Block Fill from a dropdown and rebuild it. The zero-effort way to put a playable sample on your page.
- A leveled game. The same set becomes a path of levels that unlock in order. Progress saves in the visitor’s browser, and a finish screen shows a button you choose, like “Get the full book.”
That completion screen is the point. Post a short free set, and when a visitor clears the last grid your own message and button appear, pointing wherever you like. A page of playable Block Fill also gives visitors a reason to stay and come back, so one free set finds new readers, keeps them on your page, and points them to the book.
Rebuild a grid in your browser before you choose an edition: Play Block Fill Online.
Which Edition Should You Choose?
- Choose Block Fill to start with the built-in dictionary and print-ready pages you can sell, a book that looks like yours and not like a generator’s, an interior you design yourself, and a grid you can run live in a room or on a call.
- Choose Block Fill Productivity when you are assembling whole books and want Time Saver batching, mixed-book assembly and JSON export.
- Add Interactive to either edition when you want to publish online play.
You can move up to Productivity after you buy, or add Interactive on top of either edition, so pick what fits the book you are making today.
Who This Is For
Puzzle book publishers and POD sellers. Bring a word title to the shelf that is not another crossword or word search, then turn one setup into a full book of grids, each designed to rebuild into one finished crossword, for KDP or print-on-demand. Post a few playable grids on your own site as a free taster, and the finish screen sends players to the book.
Word-puzzle and gift-book makers. Style a collection to the occasion, with colours, fonts and borders that match the cover, then let Instant Puzzle Books turn the set into a giftable interior in one pass.
Existing Puzzle Maker Pro customers. Add a fresh word type to the workflow you already know: the same presets, the same book settings, the same output habits, and nothing new to learn. On Productivity it batches with Time Saver and folds into mixed books beside your other types.
Educators and classroom creators. Use Block Fill as word-work that rewards pattern-matching over memorized answers, sized to your group, and run it live on the projector with Puzzle Slides.
Try It Before You Buy
You do not have to take any of this on faith. Every Puzzle Maker Pro module includes a free demo. Try Block Fill free, generate a few grids, export a page, and judge the output yourself before you choose an edition. See which edition is right for you above.
Licensing and Commercial Use
Block Fill lets you sell the finished books, worksheets, and packs you make to your own readers and customers, on KDP, Etsy, Teachers Pay Teachers, or your own store. One-time commercial-use licence. Watermark-free.
Block Fill Productivity includes that, plus you may sell or supply the generated puzzles to other publishers and sellers.
Both editions carry the same permission to sell. What changes as you move up is how much you can produce at once.
Product Details
| Product | Puzzle Maker Pro – Block Fill (cut-up crossword) |
| Editions | Block Fill; Block Fill + Interactive; Block Fill Productivity; Block Fill Productivity + Interactive |
| Platform | Windows desktop app |
| Grid style | Fully interlocked, magazine style: every white square belongs to an across word and a down word, with 180 degree rotational symmetry. The default 12 by 15 board carries around 65 interlocking words. |
| Puzzle rule | A filled crossword grid is sliced into uniform square blocks and shuffled into a bank, and the solver reassembles them onto the empty grid. A few anchor letters are pre-shown, spread across the blocks. No two blocks in the bank are identical. |
| Grid | Block size 2 to 5 cells per edge; 2 to 10 blocks across and down; each side of the finished grid lands between 5 and 21 cells, so if a combination goes past that, lower one of them. The default page is a 12 by 15 grid cut into twenty 3 by 3 blocks. |
| Anchor hints | 0 to 40 pre-shown letters, spread across the blocks |
| Decoy blocks | 0 to 20 extra blocks that belong nowhere |
| Difficulty | Easy fills from common words only; Regular uses the full vocabulary with common words preferred |
| Vocabulary | Built-in dictionary on every edition; Puzzle Maker Pro fills every interlocking grid for you |
| Quantity | Set per run; Time Saver on Productivity batches several setups at once |
| Output formats | PNG, JPG, SVG, PDF: the board with its block bank, and a matching solution with every cell filled |
| Solution pages | Yes, generated with every puzzle |
| Puzzle books | Instant Puzzle Books on every edition. Puzzle Book Studio on Block Fill (one collection) and Productivity (several collections in one book). Title page, contents and solution cross references on every edition. |
| Puzzle Slides | Every edition, with a movable PowerPoint tile per bank piece |
| Web play | Publish sets to your own site as a puzzle list or a leveled game, on Block Fill + Interactive or Productivity + Interactive |
| JSON export | Block Fill Productivity |
| Time Saver | Block Fill Productivity |
| Internet required | Once, so the built-in dictionary can download and cache. After that it works straight from the cache. |
| Commercial licence | Sell the finished books, worksheets and packs you make to your own readers and customers. Productivity adds selling or supplying the generated puzzles to other publishers and sellers. |
| Upgrades | You can move up to any higher edition later |
| Free demo | Yes |
| Delivery | Immediate, in your member area |
Questions Before You Buy
Is there a free demo?
Yes. Every module includes a free demo, so you can make a few Block Fill puzzles and see the output before buying.
Can I upgrade later?
Yes. You can move up to Productivity after you buy, and you can add Interactive on top of either edition. Start with the edition that fits the book you are making today.
What is a Block Fill puzzle?
A filled crossword that has been cut into small square blocks and shuffled. The solver rebuilds the grid by fitting every block back into place, using a few starter letters as a guide. There are no clues to answer.
Is the grid a real crossword, or just words laid out in a grid?
A real one. Every white square belongs to an across word and a down word at the same time, the black-square pattern is symmetrical when you turn the page upside down, and the default board carries around sixty five interlocking words. That density is why the rebuild works: each block has to agree with its neighbours on all four edges.
Do solvers need to know crossword answers?
No, and that is the appeal. Block Fill is about reassembling the grid from its pieces, not recalling trivia, so it reaches readers a clue-based crossword shuts out.
What makes a page hold together?
Every block in the bank is unique, so no piece is interchangeable, and each puzzle is built to rebuild into one finished crossword. Every page ships with its answer key.
Where do the words come from?
From the dictionary built into Puzzle Maker Pro, on every edition. It fills each grid so every letter works across and down, and you choose Easy for everyday words or Regular for the full vocabulary.
How big can the grids get?
Set the block size from 2 to 5 cells, and the number of blocks across and down from 2 to 10, as long as each side of the finished grid lands between 5 and 21 cells. If a combination goes past that, lower one of them.
Can I create a full book quickly?
Yes, on Block Fill Productivity. Time Saver runs several saved setups in one pass and Puzzle Book Studio assembles the results into books. Instant Puzzle Books builds a complete interior on every edition.
How do I make it harder or easier?
Turn the number of blocks up or down, add decoy blocks that belong nowhere, and show fewer anchor letters. You can also switch from Easy to Regular so the grid draws on the full vocabulary.
Does it support online or interactive output?
Yes. Puzzle Slides gives you a live PowerPoint round on every edition. The Interactive add-on, on either edition, publishes the set so readers play it in the browser on your own site, as a puzzle list or a leveled game with a completion screen that points to your book.
Can I sell the puzzles I make?
Yes. Block Fill lets you sell the finished books, worksheets and packs you make to your own readers and customers. Block Fill Productivity includes that, plus you may sell or supply the generated puzzles to other publishers and sellers.
Give Your Word Aisle a Puzzle It Has Never Seen
Without a word title that stands out, your next book competes on price against a shelf of crosswords and word searches your buyers have scrolled past a hundred times. Block Fill is the one they have not seen.
Six months from now, your shelf could carry a run of Block Fill titles that look like nothing else in the word category: familiar at a glance, fresh to solve, and built from a single setup per book. That starts here.
Try the free demo, rebuild a few grids, and see whether Block Fill is the word puzzle your next book has been waiting for.
