Logic Masters Deutschland e.V.

Standard sudoku rules apply: each row, column, and 3x3 box must contain all the digits from 1 to 9.

Digits may not repeat in a cage and must sum to the given total.

This is an anti-knight puzzle. Cells which are a chess knight’s move apart must contain different digits.

If you colour the grid: anti-knight xyz-wings on colours are amazing. This may be closer to 4/5 than 3/5 in difficulty.

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