Logic Masters Deutschland e.V.

Digits may repeat if allowed by other rules only once in boxes, rows and columns. example: yes 123445789, no 124445789.

Rotational symmetry- when rotated 180 degrees cells match.

Killer cages- digits sum to number in corner.

x=10 v=5

Arrows- two sets of digits sum to the digit in circle.

White dots- consecutive digits. black dots- 1:2 ratio.

Blue row indexer- digit X in position Y means digit Y must be in position X. Example: if r3c6 is 2 then r3c2 is 6.

Excluding center box:

Each box has digits 1-9.

Each row and column that does NOT cross the center box contains 1-9.

Red 3 cages have two values, one for the box and one for row or column. Example: 123345789 in r1 and 312345789 in c4 with 3 in red cage means that 3 also represents 6 123645789 612345789.

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