Normal 6x6 sudoku rules apply ie Fill the outlined grid with the digits 1-6 such that no digit repeats in a row, column or region. Numbered Rooms: Fill all circles with digits from 1-6. A digit N in a circle indicates that the Xth cell in that row or column, viewed from the direction of the clue, contains the digit N, where X is the digit in the cell next to the clue. Digits placed a chess knight's move apart cannot be the same. (This includes digits in circles.)