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In the bottom row (highlighted), you can see two pairs (1-5). You can see that they only lie along one line. |
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So, we can remove the other candidates of 1's and 5's in the row. |
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We have a single candidate 6 now. |
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This one is tripple and maybe more difficult to see. What you have are 3 cells which contain 1,3,8 and no others. |
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