Support

How to play

Tap an unlocked square, then a digit. Use each of 1–9 exactly once across the board. Match every row and column to its target; locked clues cannot change.

Helpful controls

Undo reverses an entry or hint. Hint reveals or corrects a digit. Restart clears your entries after confirmation, keeping the same puzzle. After completion, Another puzzle starts a new independent round.

Your saved game

Only the unfinished current puzzle is saved locally. Completed puzzles are not kept. Removing the app removes its local data.

Contact support

Email sunchaopin@gygscb.cn. Include your app version, iOS version, device model, and steps to reproduce an issue. Do not send passwords or payment details.