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All rows, columns and diagonals add up to 27, as do the stones in the four corner cells and the four central border cells of the full square, and of the square of nine cells in the middle.

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No. XVI

Those to whom games of Patience appeal will find an interesting and pretty form of it in the construction of a pyramid with a complete set of dominoes.

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[Image]

Solvers may like to study the position given, which is one of many that are possible, and to discover for themselves the ruling conditions which are its characteristics.

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No. XVII