Text first
Every result on this site is text: a key name, a Roman numeral, a move label. Nothing is carried by colour alone — each move is named in words beside any colour it is given — and nothing is drawn as a picture a screen reader cannot read.
Keyboard
Every control can be reached and operated from the keyboard, in reading order, with a visible focus ring. The skip link at the top of each page goes straight to the content.
Motion and sound
Nothing on this site plays a sound, and nothing moves unless you asked it to. Results replace each other in place rather than sliding in.
Contrast
Every built-in theme is checked in continuous integration for text contrast against its own backgrounds, and the theme builder reports the contrast of any palette you make before you apply it.
Telling us
If something here does not work with the way you read the web, that is a defect, and we would like to fix it.