Mirrored from Sudopedia, the Free Sudoku Reference Guide

Symmetrically minimal

A Sudoku puzzle is symmetrically minimal when removing any of its givens results in a puzzle that has multiple solutions or which has lost its symmetry.

A symmetrically minimal puzzle does not have to be locally minimal. It often is not, because the symmetry often introduces redundant givens.

This page was last modified 18:37, 16 November 2006.