Logic Masters Deutschland e.V.

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This puzzle is based on an idea of the American mathematican Edward T. Pegg, one of the most productive puzzle author in mathematic puzzle games.

Enter the numbers from 1 to 15 in the grid, so that the spacial distance to the next biggest number is larger then to the next smaller number. This means that the special distance from number 2 to number 3 must be bigger than the special distance from number 2 to number 1.

All fields with numbers must be connected vertically or horizontally.

No 2x2 area must be completely filled with numbers. The special distance is measured from the center point of each field.