Logic Masters Deutschland e.V.

Normal sudoku rules apply, (fill each row, column, and 3x3 box with the digits 1-9 once each).

Numbered Rooms: clues outside the grid indicate the digit which has to be placed in the Nth cell in the corresponding orthogonal direction, where N is the digit placed in the first cell in that direction.

For example: if R4C1 is the digit 7 and a 3 appears outside the grid next to this cell, then R4C7 contains a 3.

Odd Ones Out: clues outside the grid marked with a question mark (?) are Numbered Rooms clues from the set of odd digits (1,3,5,7,9) and are left for the solver to determine. Each odd digit must appear exactly once as a clue.

Evens: Cells marked with a grey square are even.

Link to puzzle in Sudoku Pad