--- title: "Evil Heyawake: free printable with answers" description: "Free printable evil Heyawake puzzles with answers. The biggest board we print, with two thirds of its rooms blank. Still exactly one answer." source: "https://www.oncebooks.com/heyawake/evil" --- 1. [Home](https://www.oncebooks.com/) 2. [Heyawake](https://www.oncebooks.com/heyawake) 3. Evil Free printable # Evil Heyawake An evil Heyawake is a fourteen by fourteen board cut into about fifty rooms, two thirds of which carry no number. Almost nothing comes from the numbers; the first foothold is usually a line of three rooms that cannot all stay unshaded. PuzzleDesign Difficulty A bigger board is harder, and so is leaving more of its rooms without a number. An unnumbered room is still pinned by the rule about runs, which is what lets most of a board go blank. 14×14 board, 52 rooms. A numbered room holds exactly that many shaded squares, shaded squares never touch, the unshaded squares stay connected, and no straight run of them crosses two room walls. Theme ClassicBoldSoftShadedNavyIndigoSkyTealEmeraldForestPlumBerryCrimsonEmberAmberCocoa **Customise colours** Numbers Cell lines Box lines Page background Style StandardClean Clean drops the title band and footer, leaving the grid. Generate puzzlePrint / save PDF Two pages: the puzzle and its answer. Every puzzle is proved to have exactly one answer by the same engine as our KDP studio. ## Want the whole book? This makes one puzzle. Sign up to turn it into a full Heyawake book for Amazon KDP: hundreds of graded puzzles at any trim, as print-ready PDFs. [Build the full book](https://app.oncebooks.com/publisher-studio/heyawake/edit?from=heyawake&v=2&s=eyJkaWZmaWN1bHR5IjoiRVZJTCIsImNvbG9yVGhlbWUiOnsidGhlbWVJZCI6ImNsYXNzaWMiLCJvdmVycmlkZXMiOnt9fX0) Free to build · pay once to export Preview The puzzle and its answer, as they print. Hide the preview - Heyawake Evil 1 Puzzle - Heyawake Evil · Solution 2 Solution Generate puzzlePrint / save PDF ## How to solve a heyawake The grid is cut into rooms. Shade squares so that a numbered room holds exactly that many shaded squares, no two shaded squares touch side by side, the unshaded squares all join up, and no straight run of unshaded squares crosses two room walls. ### The method 1. Start with the rooms numbered zero. A 0 means nothing in that room is shaded, which is free information and usually opens a corner. A room whose number equals the most it could possibly hold is just as free: in a room one square wide, a number that fills every other square leaves no choice at all. 2. Count the rooms a run crosses, not the squares. This is the rule the whole puzzle turns on and the one beginners skip. Look along any row or column: if three squares in a row would be unshaded and they sit in three different rooms, one of them has to be shaded. It works in rooms with no number at all, which is why most of the board can be blank. 3. Shade one square and you have ruled out four. Shaded squares never touch side by side, so every square you shade makes its four neighbours unshaded. Mark them, because those unshaded squares are what the run rule reads next. 4. Keep the unshaded squares joined up. They have to form one single region at the end. If shading a square would wall a group of unshaded squares off from the rest, it cannot be shaded, however well it suits the numbers. **The one rule people get wrong** The run rule counts ROOM WALLS crossed, not squares. A run of six unshaded squares is perfectly legal if they all sit in one room, and a run of three is illegal if it touches three rooms. That is why the walls are printed heavier than the grid. **What the answer page shows** The same grid with every shaded square filled in. Where a number sits on a square the answer shades, it is printed in white so you can still read it. **How the grades differ** A bigger board cut into more rooms, with more of those rooms left without a number. The easy grades number most rooms; the hardest leaves two thirds of them blank and leans on the run rule instead. **Is it the same as nurikabe?** No. Both shade a grid and both keep the unshaded squares connected, but in nurikabe the numbers give the size of unshaded islands and the shaded squares are meant to join up, while here the numbers count shaded squares inside a room and it is the shaded squares that may never touch. **Good for** Anyone who likes a rule that rewards looking along a line. ## Making a whole Heyawake book? This page makes one puzzle. To publish a book on Amazon KDP, the [KDP Heyawake maker](https://www.oncebooks.com/kdp-heyawake-maker) generates hundreds of graded puzzles at any trim, as a print-ready 300 DPI interior and solutions PDF. ## More printable Heyawake puzzles - [Easy Heyawake](https://www.oncebooks.com/heyawake/easy) - [Medium Heyawake](https://www.oncebooks.com/heyawake/medium) - [Hard Heyawake](https://www.oncebooks.com/heyawake/hard) - [Expert Heyawake](https://www.oncebooks.com/heyawake/expert) - [Heyawake for beginners](https://www.oncebooks.com/heyawake/for-beginners) - [Heyawake, a logic puzzle with no arithmetic](https://www.oncebooks.com/heyawake/no-arithmetic) [See every printable Heyawake](https://www.oncebooks.com/heyawake) ## Questions **Are these evil heyawake free to print?** Yes. Generate the puzzle above and print it with its answer, at no cost and with no sign-up. **Does every puzzle have one solution?** Yes. Most room layouts do not pin a shading at all, so the generator keeps only the ones a solver proves shade exactly one way. The answer is on the second page. **Can I make a Heyawake book to sell on KDP?** Yes. The free tool makes one puzzle. The KDP Heyawake maker generates hundreds of graded puzzles at any KDP trim, as a print-ready 300 DPI interior and solutions PDF.