Step-by-Step Solution
for Saturday 28th June Tricky
Before
Step
After
For box 9, candidates for 7 are all in column 8, so you can remove candidates from other blocks.
For box 1, candidates for 1 are all in column 2, so you can remove candidates from other blocks.
Candidates for 4 in boxes 5 and 8 force the candidates in box 2 to be in the remaining line.
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