Platon Sudoku · Sudoku Study
Bivalue cells · Core Concepts
A bivalue cell has exactly two candidate digits. One of those two will fill it.
This course is adapted from Platon Sudoku App. Read the complete example here, then continue learning and practising in the app.
View on Google PlayDefinition
A bivalue cell has exactly two candidate digits. One of those two will fill it.
How to find it
Count all candidates inside one empty cell.
Common mistake
Count every note in the cell. One candidate or three or more is not bivalue.
Worked example
Teaching board · local candidate diagram
Observe candidates
A bivalue cell has exactly two candidate digits. One of those two will fill it.
Verify the condition
Count all candidates inside one empty cell.
Draw the conclusion
The marked cell has exactly the two candidates 2 and 3.
Recognition practice
Teaching board · local candidate diagram
Recognition practice 1
Is the highlighted cell bivalue?
Draw the conclusion
Yes
Recognition practice 2
Is the highlighted cell bivalue?
Draw the conclusion
No
Recognition practice 3
Is the highlighted cell bivalue?
Draw the conclusion
Yes
Recognition practice 4
Is the highlighted cell bivalue?
Draw the conclusion
No
Recognition practice 5
Is the highlighted cell bivalue?
Draw the conclusion
Yes
Recognition practice 6
Is the highlighted cell bivalue?
Draw the conclusion
No
Recognition practice 7
Is the highlighted cell bivalue?
Draw the conclusion
Yes
Recognition practice 8
Is the highlighted cell bivalue?
Draw the conclusion
No
Recognition practice 9
Is the highlighted cell bivalue?
Draw the conclusion
Yes
Recognition practice 10
Is the highlighted cell bivalue?
Draw the conclusion
No
Recognition practice 11
Is the highlighted cell bivalue?
Draw the conclusion
Yes
Recognition practice 12
Is the highlighted cell bivalue?
Draw the conclusion
No
Practice
This course is adapted from Platon Sudoku App. Read the complete example here, then continue learning and practising in the app.
View on Google Play