Sudoku-YFoundations
A small Sudoku practice routine: understand one move
A useful daily goal can be as small as explaining one move yourself.
Choose an observable goal
Rules and singles give you a foundation for further techniques. The timing below is our suggestion, not a research-backed formula or a promise of progress within a deadline. Pick one task, such as identifying the only location for a digit in a box, and check whether you can explain it.
Try a roughly ten-minute session
Spend two minutes reviewing a condition and example, five trying before revealing the reasoning, and three changing the digits or looking for the idea in your own game. Adjust those times freely. The important part is a chance to think, followed by a chance to identify a specific misunderstanding.
Change a condition, not just an answer
If you remember “this cell is 7”, add another possible position for 7. Suppose A1 was its only place in row A. Allowing 7 at A6 removes that argument for A1=7. A learner who notices the changed condition is doing more than recalling a number.
Record what needs another look
Note whether you missed a column, omitted a candidate or chose a target seeing only one end of a pattern. Digit replay on this site uses the same pattern. It helps practise the explanation; recognising unfamiliar layouts also requires different positions and distracting information.
Try before looking
Try before revealing
Does solving a relabelled copy prove you can recognise the technique in any puzzle?
Show explanation
No. It is useful practice, but try unfamiliar positions and surrounding candidates before drawing that conclusion.
References and further reading
Read the source explanations and compare them with our examples. Links are references, not endorsements or claims of affiliation.