Practise: Unique Rectangle
This verified teaching position begins directly with a real Unique Rectangle pattern. Follow the chain, inspect the candidates and make the deduction before you continue.
You are at the verified key position. Use a hint to follow the chain link by link when you need support.
How to spot it
Look for three cells with identical pairs at three corners of a rectangle, where the fourth corner contains those two digits plus others. Check that the rectangle covers only two boxes. Then remove the two pair digits from the fourth corner.
Put it to use
Where you will meet it
Expert grids are the only place this pattern regularly decides the solve. Bring your notes.
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