Logic Masters Deutschland e.V.

Authors: Chameleon, Raumplaner.

Standard chess rules apply: place chess pieces on the board to create a position that could be reached in a standard game of chess.
Also, there's a 6x6 sudoku grid in the middle of the chessboard.
Standard (almost) sudoku rules apply: chess pieces cannot repeat in rows, columns and boxes. For instance, there could be no other bishops (regardless of color) in the bottom-right box, in column f and in row 3. However, unlike in sudoku, you are not required to fill every cell (there will be blank spaces).
There were no pawn promotions in the game that led to the current position on the board.
Both white and black have a mate in 1 move in case it's their turn.
There are no chess pieces outside the sudoku grid. The chess piece that moves to do the mate in one can't escape the sudoku grid either (while doing the move). The kings can move outside the sudoku grid, though (it's not a mate if the king has a legal move outside the sudoku grid).

Solve online: PuzzleTV