Shade some cells in the grid above such that the set of shaded cells is connected, has 90-degree rotational symmetry about its center, and contains the same number of shaded cells in each outlined …

The knight stopped on his 28th square, at which point the 28 visited squares formed a picture with spiral symmetry (90 degree rotational symmetry). The numbers along the sides of the 8 rows and 8 …

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