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
Mistakes0Hints0Score2,000Time0:00
Your turn first
Spot the idea before the hint explains it
- 1. Look
- 2. Check
- 3. Proof
Look at the marked starting cell, cage outline and sum. Which digit or combination is forced, and what visible sum fact supports your idea?
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