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Euler Squares - Diagonalization

Elaine Young

Placing a single color down a main diagonal of the pegboard begins this method. Then place another color on a parallel diagonal, noting this will leave a single peg of that color to be placed in the opposite corner. Continue to diagonalize by color. This is an eye-pleasing and symmetrical solution. Double diagonalization can be accomplished by placing color on one main diagonal and shape on the other second diagonal (see Figure 5).

Figure 5: Double diagonalization solution

Elaine Young, "Euler Squares - Diagonalization," Convergence (May 2011)