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 3x3 box.
Classic board game Draughts (international draughts on a 10x10 board), defeat your opponent by capturing his piece and try to promote your piece to a King.
The Classic Othello board game. Players take turns placing disks on the board with their assigned color facing up. During a play, any disks of the opponent's color that are in a straight line and bounded by the disk just placed and another disk of the current player's color are t [...]
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 more then 2 connections.