Practise: Jellyfish
Follow one digit only: which four rows or columns keep 5 inside the same four cross-lines?
The prepared notes show every 5 that matters. Find the four source lines whose candidates fit in the same four cross-lines; do not place a digit yet.
Example 1 of 4
Your turn first
Where can 5 no longer stay?
Look only at the prepared 5-notes. Find four rows or columns whose possible homes fit in the same four cross-lines, then identify the other 5-notes on those cross-lines to remove. Do not place a digit yet.
Remember
A Jellyfish is simple: four source lines offer one digit only within the same four cross-lines. Those cross-lines must receive the digit from the pattern, so every other note for it there disappears. The Jellyfish itself does not place a digit.
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