Mirrored from Sudopedia, the Free Sudoku Reference Guide
A Bilocal Unit exists in a house where only 2 candidates are present for a particular digit.
The pair of cells containing these candidates are called a conjugate pair. The candidates themselves have a strong link, because one of them must be true.
Bilocal units are the building blocks for several solving techniques, including coloring and several types of chains and loops.
This page was last modified 18:10, 21 November 2007.