3D Medusa
Expert
Coloring taken to its full extent: a two-colour cluster built across all candidates and links at once, in three dimensions. Contradictions within a colour, or cells seeing both colours, drive the eliminations.
Expert
Coloring taken to its full extent: a two-colour cluster built across all candidates and links at once, in three dimensions. Contradictions within a colour, or cells seeing both colours, drive the eliminations.