Choose a difficulty to generate a fresh puzzle.
When automatic error check is on, invalid entries are flagged red as you type. When off, use the Check Board button during a game.
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Tip: use ← Menu to leave — your game is saved and can be resumed later.
Pick a number to place it in the selected cell.
Auto-check is off — use Check Board to review the grid.
Ending this game counts it as abandoned (no win) and resets your win streak. Progress will not be resumable.