Technique Journey
Bite-sized lessons that teach one Sudoku deduction technique at a time. 0 of 15 complete.
- Naked Singlesnaked single
Spot the cell where only one digit fits.
- Naked Singles — Practicenaked single
Eight cells, one technique. Scan the whole board.
- Hidden Singleshidden single
Find the only home for a digit inside one unit.
- Hidden Singles — Practicehidden single
Scan each unit until a digit has only one landing spot.
- Singles — Mixed Practicemixed
Use naked and hidden singles together.
- Pointing Pairspointing pair
Use a box pattern to clean up a row or column.
- Box-Line Reductionbox line-reduction
Use a row or column pattern to clean up a box.
- Intersections — Mixed Practicemixed
Switch between pointing pairs and box-line reductions.
- Naked Pairsnaked pair
Two cells reserve two digits for themselves.
- Naked Triplesnaked triple
Three cells reserve three digits together.
- Hidden Pairshidden pair
Two digits hide inside the same two cells.
- Subsets — Mixed Practicemixed
Practice pairs, triples, and hidden pairs together.
- X-Wingx wing
Use two matching lines to eliminate a digit.
- Swordfishswordfish
Track one digit across three rows or columns.
- Technique Journey Capstonemixed
Bring the whole toolkit together.
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