--- title: "Sudoku help: find a logical next move" description: "Stuck on a Sudoku? Follow a checklist, work through one certain move and see how Unisu’s three hint stages explain the next logical step." lang: "en" canonical: "https://unisu-sudoku.app/en/sudoku-hints/" --- [Back to the learning guides](https://unisu-sudoku.app/en/learn/) Fundamentals # Sudoku help: find a logical next move A checklist for getting unstuck, one certain example move and the three stages of Unisu’s hints. ![Unisu lesson on Full House, showing the explained grid](https://unisu-sudoku.app/_astro/en.Bnh-GLbv_INnQn.webp) When no move stands out, start with a smaller question. Which digit is missing from a nearly full row? Which candidates remain valid after the last move? ## Check the basics first Look for a row, column or box with one gap, then check Naked Single and Hidden Single. Update notes in the areas affected by your last move. An incorrect entry or missing possibility can hide the next deduction. ## One certain move For a simple example, a row already contains 1, 2, 3, 4, 5, 6, 8 and 9. Only 7 is missing, so it belongs in the last empty cell: a Full House. With several gaps, also check the positions allowed by columns and boxes. ## Read a hint in Unisu A hint first points to the relevant area, then explains the reasoning and finally names the move. Open the stages in order and check the idea against the grid. All stages for the same move use only one of the three hints per puzzle. You enter numbers yourself and explicitly accept suggested candidate eliminations. ## Keep learning from the move After reading a hint, try spotting a similar pattern yourself. Each linked guide explains one principle. In the app you can follow guided examples and attempt independent tasks. This page is not a solver for arbitrary puzzles entered from elsewhere. ## Frequently asked questions ### What should I check before opening a hint? Look at nearly full areas, check Singles and update affected notes. An incorrect entry can also hide a valid next move. ### How many hints do I get per puzzle? Three. The explanation stages of the same move count as one hint. You can reopen an explanation you have already viewed. ### Does a hint enter the answer automatically? You enter digits yourself. Candidate eliminations require your confirmation; reading the explanation does not apply the move for you. ### Why does a hint sometimes only remove a candidate? In harder puzzles, an elimination may be the next justified step. It can lead to a definite placement later. ### Can I submit another puzzle to be solved here? This website is not a solver for imported puzzles. The guides explain reasoning; the app’s hints work from its current game state. ## Keep practicing in Unisu Download Unisu for iPhone or Android. Solve a puzzle or work through a guided lesson on the technique. - [Download on the App Store](https://apps.apple.com/us/app/id6775824061?l=en) - [Get it on Google Play](https://play.google.com/store/apps/details?id=app.unisu.sudoku&hl=en) ## Useful before this guide ### How to play Sudoku: rules and your first move [Read more: How to play Sudoku: rules and your first move](https://unisu-sudoku.app/en/sudoku-rules/) ### Solve Sudoku without guessing: a repeatable search order [Read more: Solve Sudoku without guessing: a repeatable search order](https://unisu-sudoku.app/en/sudoku-without-guessing/) ![An explanation in stages](https://unisu-sudoku.app/_astro/en.BEj6mC5U_otm5g.webp) Start with the relevant area, then read the reasoning and the specific move. You still enter the number yourself. ## Where to go next Fundamentals Unisu · Oct 26, 2026 ### [Solve Sudoku without guessing: a repeatable search order](https://unisu-sudoku.app/en/sudoku-without-guessing/) Check nearly full areas, then candidates and singles. Build a routine for finding a move you can explain. Unisu ### [Learn Sudoku: a path from rules to techniques – Unisu](https://unisu-sudoku.app/en/learn/) Start with the rules, get comfortable with pencil marks and choose a technique for the situation you’re working on. Download app ## Ready for a puzzle? Take a moment. Download Unisu on your phone. Start a Sudoku or choose a lesson on the technique you want to understand. - [Download on the App Store](https://apps.apple.com/us/app/id6775824061?l=en) - [Get it on Google Play](https://play.google.com/store/apps/details?id=app.unisu.sudoku&hl=en) ![The daily challenge in Unisu](https://unisu-sudoku.app/_astro/en.C-sYR9hJ_1QwI9G.webp) ![A classic Sudoku game in Unisu](https://unisu-sudoku.app/_astro/en.C6DJ1kiE_2dRWDN.webp)