Entering puzzles

Choose Import and paste the puzzle as text. The app works out the format by itself. It accepts:

• 81 characters in one line, with . or 0 for an empty cell. A trailing # comment is ignored.
• Nine lines of nine characters, with or without grid borders (|, -, +).
• A candidate grid (the digits that are still possible in each cell).
• Exports of SimpleSudoku.
• HoDoKu's library lines (:0000:x:...), and the puzzle field of the q2 taxonomy lines.

Anything with fewer or more than 81 cells is rejected with a message. The puzzle also has to have exactly one solution; if it has none or several, the app says so and does not load it.

Sharing a puzzle

Copy puts the 81-character line of the givens on the clipboard. Paste it anywhere, or into Import on another device. A link of the form /play/?p=<81 characters> opens that puzzle directly. The technique guides use this for their Open in app buttons.

Printing

Print prints the board with the givens only, without candidates or the side panel.