Logic Masters Deutschland e.V.

Classic 6x6: Normal 6 by 6 Sudoku rules apply. Fill the grid so that each row, column, and 2 by 3 box contains the digits 1–6 exactly once.

Killer Cages: Digits within a cage must not repeat. If a total is indicated in the upper-left corner of a cage, the digits within that cage must sum to that total. Some cages do not have a given total.

White Kropki Dots: Digits separated by a white dot must be consecutive.

Setup: At the start, a coin is placed on an initial cell. This cell cannot be inside a cage and cannot be the "Win" cell (the bottom-right cell).

Turn Order: This is a two-player, turn-based game. Player 1 moves first.

Movement: A player may move the coin one cell downward, one cell to the right, or one cell diagonally (lower-right).

Constraints: The coin cannot enter any cell that is part of a Killer Cage. (For example, a coin at R2C1 can be moved to R3C1 or R2C2 but not R3C2; and a coin at R2C5 can be moved to R3C6 but not R3C5 and R2C6).

Winning: The player who moves the coin onto the "Win" cell wins the game.

Optimal Play: Assume both players play optimally. If the initial cell is a winning position for Player 1, the digit in that cell must be odd. If the initial cell is a losing position for Player 1, the digit in that cell must be even.