Noughts and crosses, or tic-tac-toe, is a simple game – but twist the rules and you can really spice it up, says Peter Rowlett ...

[Circuitchef] used gates and a few flip-flops to build a two-player electronic Tic-Tac-Toe game. The full details ... The board is arranged in a 3×3 matrix of momentary push buttons and bi ...