Printable Evil Sudoku — 6 Per Page
Six evil sudoku puzzles on a single sheet — the densest extreme-difficulty layout.
6 puzzlesSix freshly generated evil sudoku puzzles on a single A4 or US Letter sheet — the densest layout we offer at the hardest tier we generate. Evil grids ship at or near the 17-given theoretical minimum, take ninety minutes to several hours apiece, and reward only the most disciplined candidate-notation workflows. Six puzzles per sheet is therefore nine to eighteen hours of solving on a single printed page — a multi-month batch for most solvers.
At this density and difficulty the cell-width trade-off is most pronounced. Six-per-page evil prints cells at roughly six to seven millimetres on the long edge — the floor of what works for the full nine-candidate pencil-mark notation evil puzzles regularly require. Solvers with small, careful handwriting find this manageable; solvers who prefer roomier marks should print evil at four-per-page (around eight millimetres per cell) or one-per-page (around seventeen). The puzzles themselves are identical regardless of layout — only the print size changes, and with it the comfort of writing dense pencil marks.
The six grids on the sheet are independent, drawn from six different seeds, with six different solving paths through the same evil difficulty. Each has a distinct puzzle ID and a corner QR code linking to the same puzzle in the on-screen solver. Refresh the page for a new six-puzzle batch. The format is most useful for solvers running a long-term project — chip away at the sheet across a vacation, across a sabbatical, across a quiet month between contracts.
A caveat worth being honest about: six-per-page evil is the most demanding format we offer. The combination of the hardest difficulty with the smallest cell width is a stretch for many solvers, and there is no shame in stepping down to four-per-page or one-per-page if you find the candidate marks start to run together. The point of the layout is to serve the solvers who want maximum density; for everyone else, the other layouts at the same difficulty are equally available and equally free.
Every puzzle on the sheet is uniquely solvable by logic alone. Evil grids regularly require X-wings, swordfish, XY-wings, XYZ-wings, simple colouring, multi-colouring, and the occasional forcing chain — never guesswork. Six-per-page printable evil sudoku is free, with no account gate, no per-day limit, and no watermarks. The reproduction license permits free non-commercial use in any setting. Switch to four-per-page or one-per-page from the layout selector if you prefer roomier cells.
Frequently asked questions
Quick answers about printing sudoku from Sudoku247Online.
- What does Evil difficulty mean?
- Evil puzzles ship at 17 given numbers — the mathematical minimum for a uniquely solvable sudoku. Every blank cell is in play and the grid demands the deepest logical chains we can generate.
- Are Evil sudokus solvable by humans?
- Yes — every Evil puzzle on Sudoku247Online is verified solvable by pure logic, no guessing required. But solving one cleanly often takes 90 minutes or longer.
- What techniques do I need for Evil?
- Everything: X-wing, swordfish, XY-wing, XYZ-wing, two-string kites, naked quads, hidden quads, and forcing chains. Our /strategies guides cover each pattern with worked examples.
- Why print Evil sudokus instead of solving online?
- Many Evil solvers prefer paper for the freedom to write extensive pencil marks and to backtrack visually. Online timers can add pressure that doesn't suit a 90-minute puzzle.
- Should I solve Evil 1 per page only?
- Yes — Evil needs every square millimetre of writing space. 4-per-page and 6-per-page layouts make pencil-mark tracking nearly impossible at this difficulty.
- What's harder than Evil?
- Nothing on Sudoku247Online today — Evil is at the proven 17-given floor. Some sites label puzzles 'Diabolical' or 'Inhuman' but they're typically the same logical complexity with different branding.