A new version of the Sudoku puzzle has appeared on the playing fields and its popularity is growing. Cat Sudoku: Brain Meowdoku is one of them. You are invited to go through levels and fill the squares of the field with cats at each one. The cells on the field are painted in different colors, which form color groups. According to the rules, you can only place one cat in each color group of cells. You need to start solving by finding single colored cells, you can safely click on them twice to make the cat appear. Further vertically and horizontally there should be no cats and you can place crosses on all the cells. This will make it easier for you to find other places to place cats in Cat Sudoku: Brain Meowdoku.