Logic Masters Deutschland e.V.

Standard sudoku rules: Fill the grid with the digits 1 to 9, so that each digit occurs exactly once in every row, every column and every 3x3 box.

XV: Digits separated by a V add up to 5 ; digits separated by an X add up to 10.

KILLER SUDOKU: Digits in cages add up to the number in the upper left corner (if given) and cannot repeat within its cage.

Digits in a WHITE CIRCLE exist in the cells surrounding the circle. Digits can repeat if allowed by other rules.

Along a THERMOMETER, digits strictly increase from the bulb/reservoir to the end.

ODD/EVEN: A grey square contains an even digit, a grey circle contains an odd digit.

MINIMUM/MAXIMUM: A digit in a minimum/maximum cell (= cell with four inequality signs) must be respectively smaller or bigger than all digits in the cells orthogonally connected to that cell.

LITTLE KILLER SUDOKU: Digits along the indicated diagonal add to the number given outside the grid. Digits may repeat if allowed by other rules.

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