Logic Masters Deutschland e.V.

Blue numbers outside the grid are X-sums: clues outside the grid contain the sum of the first X digits in the row or column where X is the digit in the nearest cell.

Green numbers are sandwich sums: clues outside the grid indicate the sum of the digits between the 1 and the 9 in that row/column.

Red numbers are skyscrapers: clues outside the grid indicate the number of digits visible in that direction, where higher digits block the view of lower ones.

Little Killers: Black numbers outside the grid with an arrow are the sum of the digits in the cells along the indicated diagonal. Digits may repeat along these diagonals if allowed by other rules.

Black dots between cells indicate a 1:2 ratio.

Digits do not repeat within cages and sum to the number in the top left corner.

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