Number spiral/en

Alternative name: Magic spiral

Instructions

Fill in the grid so that every row and every column contains each digits '1' through 'n' exactly once. Starting from the left bottom corner following the spiral there must be the sequence '1' - '2' - ... - 'n' - '1' - '2' - ... - 'n'.

 

Weblinks

• Number spirals from Alexandru Szöke at janko.at: 1 2 3

• Number spirals at sachsentext.de