Shapedoku Hints: The Free Hint That Teaches You Why

How Shapedoku hints are different

Shapedoku hints are built around a simple idea: a good hint should explain itself. The first hint on every puzzle is free, and it does more than fill a cell. It tells you why that shape is the answer. Maybe it is the last open spot in a row, so only one shape can complete it. Maybe it is the only candidate left for that cell after the column and box are accounted for. Instead of a mystery reveal, you get the small piece of logic you were missing, which is exactly the thing you can reuse.

That framing matters because Sudoku improvement is really pattern recognition. When Shapedoku hints point at a cell and say this is the last spot in the box, you start noticing last-spot situations on your own. The hint becomes a lesson rather than a crutch.

The free first hint, and the rewarded second

Every puzzle gives you one free hint. Use it whenever you are genuinely stuck, or when you finish a region and want to check that your reasoning matches the game's. If you need a second hint on the same puzzle, that one is optional and uses a rewarded ad, so you choose whether it is worth a short watch. Nothing is forced. You can play an entire puzzle, or an entire session, without touching a single hint if you would rather solve it clean.

• First hint: free, explains the why, best used when you are truly stuck or want to learn a pattern.
• Second hint: optional and rewarded, for when one more nudge is worth a short ad.
• Zero hints: the purest solve, and the path that most improves your skill.

When a hint helps and when it hurts

Reaching for Shapedoku hints too early robs you of the search that builds skill. The best moment for a hint is after you have honestly scanned every row, column and box and still cannot find a forced move. At that point the hint is not skipping the work, it is teaching you the technique you did not yet know. Reaching too late, when you are frustrated and guessing, is worse, because a wrong guess in Classic costs one of your three mistakes.

1. Scan all nine rows, then all nine columns, then the boxes for a single obvious placement.
2. Check the shape you have the most of already; it is often close to being fully placed.
3. Only then spend the free hint, and read the explanation instead of just taking the shape.
4. Try to find the next move yourself before considering the rewarded second hint.

Hints, mistakes and modes

Classic Shapedoku allows three mistakes and even offers an optional rewarded extra life, so hints are a support, not a lifeline. Some challenge modes deliberately remove that support: Perfect Run asks you to finish with no mistakes, no hints and no extra life, which is where you find out how much the explanations actually taught you. If you learn the reasoning from Shapedoku hints in Classic, you carry it into Perfect Run and win without them.

Used well, Shapedoku hints are one of the fastest ways to get better at shape Sudoku, because they turn a stuck moment into a small, memorable lesson. Play free at app.shapedoku.com or on Google Play, and start with that free first hint whenever a puzzle stops making sense.