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Every row and column has a target number. In Pen mode, tap a digit to circle it if you think it belongs to the solution. In Erase mode, tap a digit to cross it out if it doesn't. Each heading shows a live running total of what you've circled so far — get every row and column to match exactly, and the level is solved.

A "Try Again" screen appears and the board resets so you can attempt the same level again with fresh hearts. You don't lose your overall progress or drop back a level.

You start with two free hints, which instantly circle or cross out one correct cell. Once you run out, tapping the hint button offers a short rewarded ad — watch it to earn one more hint.

First, make sure you're signed into the same Apple ID used for the purchase. Then reopen the app — purchases sync automatically on launch. If ads are still showing after that, email us with your Apple ID's associated email and the approximate purchase date and we'll help sort it out.

Puzzle progress is stored locally on each device, so it won't transfer automatically to a new phone. Your Remove Ads purchase will restore automatically once you're signed into the same Apple ID, since that's handled by Apple rather than stored on the device.

Email us a quick description of what happened, your device model, and your iOS version if you have it handy — screenshots help a lot too.