| Sudoku Tutorial |
| Hidden Double |
| The 4 and 8 are confined to two cells in the row (but not the
box!) Therefore the extra candidates (3, 6, and 9) can be removed from the yellow cells) (click 'continue')  (back) (continue) |
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| Sudoku Tutorial |
| Hidden Double |
| The 4 and 8 are confined to two cells in the row (but not the
box!) Therefore the extra candidates (3, 6, and 9) can be removed from the yellow cells) (click 'continue') (back) (continue) |