Steps 16-18
| Step 16 | ||
 |
Simple Elimination The purple highlighted square is missing the number 7. The red highlighted 7 eliminates all but one of the empty tiles in this square. The remaining empty tile must be a 7. |
 |
| Step 17 | ||
 |
Single Possibility The purple highlighted square is missing the number 3 and only has one empty tile. That tile must be a 3. |
 |
| Step 18 | ||
 |
Single Possibility The highlighted row only has one empty tile. That tile must be the missing number, 2. |
 |