We want Logic Puzzle Lab to be usable by as many people as possible, including older solvers, people with low vision and people who don't use a mouse. This page says what we have done, what still falls short, and how to tell us about problems.
Playing with a keyboard
The puzzle boards are built to be played from the keyboard. You can move between cells with the arrow keys, type digits directly, and reach the buttons such as Check, Pencil, Undo and Print PDF with the Tab key. Focus is shown with a visible outline so you can see where you are on the board.
If a particular puzzle type doesn't respond as you expect from the keyboard, please tell us which one and what you were trying to do.
Large print
Large print PDFs are available for killer sudoku, nonograms, kakuro, calcudoku and logic grid puzzles. They use bigger cells and larger numbers and text, and like the standard printables they include the answers on the last pages. You can start with large print killer sudoku or large print logic puzzles.
On screen, the site follows your browser's zoom and text size settings, so you can enlarge the board as far as your screen allows.
Color and contrast
We aim for text and grid lines that meet the WCAG 2.1 AA contrast guidelines, and we try not to rely on color alone to carry meaning: cage outlines, region borders and given digits are distinguished by line style or weight as well as by color.
What we are still working on
- Screen reader support for the puzzle boards is limited. Grid puzzles are hard to present well through speech, and we have not yet tested the boards thoroughly with screen readers.
- Samurai sudoku and jigsaw sudoku don't have large print editions yet. A samurai board in particular is dense on a single page.
- The largest nonograms, at 20×20 and 25×25, have small cells on a phone screen. They are easier on a tablet, a desktop or in print.
- We have not had the site formally audited against accessibility standards.
Tell us about a problem
If something on the site gets in your way, email hello@logicpuzzlelab.com or use the contact page. Tell us the page, the device and browser you were using, and any assistive technology involved. We read every report and will fix what we can.