Outcome
You can identify a cell's row, column, box, and peers without needing the interface to label them first.
Intro copy
Rows, columns, boxes, peers — these names will appear everywhere in Sudoku.
Once you can spot them instantly, later explanations become much easier to follow.
Step 1 — Cell
One square is a cell.
Optional secondary label: r4c7.
We can describe a cell precisely by its row and column. You do not need to memorize coordinates to play.
Step 2 — Row
A row is a horizontal group of nine cells.
Prompt:
Tap the row that contains the target cell.
Correct feedback:
Good. Every digit can appear only once in this row.
Step 3 — Column
A column is a vertical group of nine cells.
Prompt and feedback mirror the row exercise without duplicating all copy.
Step 4 — Box
A box contains nine cells. Each box also needs the digits 1–9 without repetition.
Step 5 — Peers
These cells are the target cell's peers. A solved digit affects the candidates in all of its unsolved peers.
Do not require the learner to count them.
Try it
Run five randomized identification prompts using a fixed validated teaching grid:
- tap this cell's row
- tap this cell's column
- tap this cell's box
- choose a peer of this cell
- choose a cell that is not a peer
Completion
5 correct tasks. Allow retries without resetting the lesson.
Next
The Rules — use these grid structures to decide whether a placement is allowed.
Reference
Read Sudoku Grid Explained.