Game technique · Sudoku
Simple Coloring in Sudoku
Color candidates of one digit along strong links using two alternating colors.
🎮 Play Sudoku →How it works
Color candidates of one digit along strong links using two alternating colors.
Example
If two same-colored candidates see each other, that color is false. A cell seeing both colors cannot contain the digit.
Key point
Color candidates of one digit along strong links using two alternating colors.