Lesson 4 · Solving routine
Scanning
Search for one number at a time instead of jumping randomly around the board.
See the logic move
Use Next to reveal each reason. On the final step, tap the highlighted cell to complete the move yourself.
Step 1 of 3
Choose 5
We will scan only for number 5.
What the board is showing
PatternThese cells form the logical pattern that proves the move.R1C1, R2C6, R8C9
Explain it simply
Pick a number and sweep through the boxes. Rows and columns show where it cannot go.
Step by step
- Choose a number.
- Find boxes missing that number.
- Use rows and columns to block cells.
- Place it when only one cell remains.
Quick check: What should you do after a successful scan places a number?
Scan again because the new number may unlock another placement.
Turn logic into skill