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Trix
The Grid
The Set
The set of triangles with zero to three hexagons, combined with the set of hexagons with zero to six triangles.
One element features in both sets - leaving one of this pair out renders the "single set". If instead all single pieces are doubled, we get the "double set", with triangles in two colors.
The Idea
A single set in a solution featuring triangles in two colors.
Two double set a solutions.
Trix © MindSports.