BeginnerBasics
Practise: Hidden Single
This puzzle leans on the Hidden Single throughout. Work through it and the move becomes second nature.
Practice
Mistakes0Score1,000Time0:00
How to spot it
Pick a digit and a unit, then check which cells in that unit could take it. Cross out every cell blocked by the same digit in its row, column or box. If a single cell survives, that is your hidden single. Working digit by digit through the boxes — 1 through 9, box by box — finds most of them quickly.
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Put it to use
Where you will meet it
This pattern is the backbone of easy grids. Start one and you will use it within a few moves.
Play EasyStuck on a grid of your own?
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