BeginnerBasics
Practise: Cross-hatching
Cross the three rows and three columns through the highlighted box. Where is the 1 left?
Example 1 of 4
Practice
Mistakes0Hints0Score1,000Time0:00
Your turn first
Where is the 1 left?
Look only at the highlighted box. Cross out its rows and columns that already contain the 1. Which square is left? Enter the 1 when you are sure, or compare your idea with the hint.
Remember
Cross-hatching is simple: cross out rows and columns in one box until one square is left for the digit.
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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.
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