Strategy

Sea battle with three weapons: torpedoes, air strikes and a radar sweep. Hit with any of them and you go again.

Ten ships hidden on a ten-by-ten grid. Find them before they find you.

The whole game on a board you could have drawn yourself, on a proper chess clock: against the computer at three strengths, or against a friend on a link.

Noughts and crosses: three in a row on the classic 3×3, four on 4×4, or five in a row across a 15×15 page.

Buy the streets you land on, charge rent to whoever lands on yours, build houses and hotels, and trade your way to a whole colour group. Last one solvent wins.