Normal sudoku rules apply. Digits on a grey line must increase or stay the same from bulb to tip. A digit contained in a large white circle must appear at least once in the four cells it touches. Digits connected by a black dot must be in a 2:1 ratio. Digits connected by a white dot must be consecutive. Not all dots are necessarily given. Each set of three digits along a yellow line must comprise a full set of the digits modulo 3, i.e. one each of [147], [258], and [369].