TicTacToeKata is all about having fun with TDD or BDD, SOLID and is inspired by the Codurance ideology of trying to strive to be a master craftsman

https://en.wikipedia.org/wiki/Tic-tac-toe for defining your domain rules and possible strategies

• Players can't play on a played position
• There can only be two players and they alternate goes
• 0 always goes first

• TDD or BDD for testing structure
• SOLID principles or clean code principles must always be applied
• KISS
• NO DRY or Anti patterns, at least on the second version
• NO Comments or little ideally
• Create unit test to prove all the scenarios
• Create either a console app, windows forms or web app to use the lib to demonstrate (No need to test this, just to visually display an interact with your library)