Rules and turns are what these games are built on. Sudoku gives you a grid plus a group of digits, and completing it is the task, with each number kept unique inside every row, column and box. Chess and checkers reward thinking ahead and steering clear of leaving a piece undefended. Backgammon combines dice with blocking. Solitaire pits you against the deck. Ludo is the game where chance and a little spite determine who reaches home first.
If you want something calm to play on the bus, begin with Sudoku Online. Master Chess is the choice for those who already know how the pieces move and want a real opponent. Ludo Legend is the simple option for playing with someone nearby while yelling at the dice.
