Steps 7-9
| Step 7 | ||
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Simple Elimination There are two empty tiles in the highlighted 3x3 square. The missing numbers are 2 and 5. The crossing column eliminates one of them from being 5, so 5 is assigned to the only remaining tile. |
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| Step 8 | ||
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Single Possibility There is only one empty tile in the highlighted 3x3 square. The missing number is 2, so that is assigned to the empty tile. |
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| Step 9 | ||
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Simple Elimination There are three empty tiles in the highlighted 3x3 square. The missing numbers are 2, 3 and 7. The highlighted 3 eliminates two of them from the empty tiles in the square, so the remaining empty tile must be a 3. |
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