Logic Masters Deutschland e.V.

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RULES: All standard rules.

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Normal sudoku rules apply - Place the digits 1-9 in each box, row and column.
Region Sum lines (blue) (Standard) - digits on these lines have an equal sum N within each box it passes through. If a line passes through the same box more than once, each individual segment of such a line within that box sums to N separately.
Different lines can have the same or different sum.
Kropki (black) separate two digits with a ratio of 1:2. Not all dots have necessarily been given.
Kropki (white) separate two consecutive digits. Not all dots have necessarily been given.

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