Connect all the light bulbs with each other and also with the main battery. You have to create as many connections to other bulbs as the number indicated on the bulb. Two bulbs can be connected with each other only vertically or horizontally and with no [...]
Every day a new Sudoku in 4 difficulty levels. Also with an archive of several months. Solve according to the sudoku rules: a number (from 1-9) can only be used once in every row, column or 3×3 box.
