Normal sudoku rules apply. A cell with a grey square must contain an even digit. A cell with a grey circle must contain an odd digit. Cells separated by a black dot must contain digits in a ratio of 1:2. (Not all black dots are given.)
Normal sudoku rules apply. A cell with a grey square must contain an even digit. A cell with a grey circle must contain an odd digit. Cells separated by a black dot must contain digits in a ratio of 1:2. (Not all black dots are given.)