BeginnerPractice
Practise: No repeats in a cage
This Killer puzzle stalls at exactly the point where No repeats in a cage is needed. Work it out yourself, or jump straight to that position.
Skip the obvious cells and start where the technique matters.
Practice
Mistakes0Score2,000Time0:00
How to spot it
Find cages that reach across a box or row boundary, then check whether a candidate digit already appears elsewhere in the same cage. If it does, it can be struck.
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Put it to use
Where you will meet it
Medium grids are where this move starts to matter: the obvious cells run out and the pattern takes over.
Play MediumStuck on a grid of your own?
Type the position into the solver and it walks the whole solution, naming the technique behind every step — including this one.
Open the solver