Mirrored from **Sudopedia**, the Free Sudoku Reference Guide

# Weak link

A **weak link** exists between any 2 candidates that cannot be true (i.e. part of the solution) at the same time. These 2 candidates can either represent 2 different digits in a single cell or represent the same digit in a house.

When the 2 candidates are the *only* 2 candidates left in the cell or unit, they have a strong link rather than a weak link.

## Implication Table

For the weakly linked candidates named **A** and **B**, we can make the following deductions:

- When
**A** is true, **B** is false.
- When
**B** is true, **A** is false.

This page was last modified 14:05, 1 November 2006.