A short explaination of example can be found here
Our company devel a suite of command line games. One of the first game developed was a Tic Tac Toe game. The game code has been taken from here.
In the last years the game lose actrativity, the company would add new feature to relaunch on market.
A first request came to us, add the possibility to resize game's board.
Use Golden Master Patter for handle the problem.