Logic Masters Deutschland e.V.

Rules
Normal sudoku rules apply.
Some 3x3 magic squares are hidden in the grid. Each row, column and main diagonal of such a square must sum to the same total.
A digit in a circle indicates the number of magic square cells surrounding that cell, including itself.
A digit in a square indicates the number of magic square cells seen horizontally and vertically from that cell, including itself.
All circles and squares are given.

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