The case notes
Count even digits through V and white dots
Two V marks and two white dots make four separate pairs in this row. One cell sits outside all four pairs. Watch a worked example, then try the idea in a puzzle.
Put it into practice
Four marked pairs
Two V marks and two white dots make four separate pairs in this row. One cell sits outside all four pairs.
Each pair: one odd, one even
A V pair adds to five, so one digit is odd and one even. Consecutive digits around a white dot also have opposite parity. Each pair uses exactly one even.
Four pairs use all four evens
A Sudoku row has four even digits: two, four, six and eight. Our four marked pairs have used one each. There are none left for the last cell.
Last cell: odd
Cross out every even digit there. That cell is odd, though we do not yet know which odd digit it holds.
Read the transcript
Two V marks and two white dots make four separate pairs in this row. One cell sits outside all four pairs. A V pair adds to five, so one digit is odd and one even. Consecutive digits around a white dot also have opposite parity. Each pair uses exactly one even. A Sudoku row has four even digits: two, four, six and eight. Our four marked pairs have used one each. There are none left for the last cell. Cross out every even digit there. That cell is odd, though we do not yet know which odd digit it holds.
Keep following the clues
- Kropki Sudoku: How Kropki dots work →
- XV Sudoku: What X and V mean →
- Kropki Sudoku: Find the partner across a dot or marker →
- Kropki Sudoku: Read two dots together →
- Kropki Sudoku: Carry a Whisper’s side through a black dot →
- Kropki Sudoku: Let a Whisper choose between dot-chain options →
- Kropki Sudoku: Follow a chain of black dots →
- Kropki Sudoku: Use a black dot to protect a box’s last one →
