I first discovered the game in these Numberphile videos:
The full mathematical analysis including the winning strategy is described in the paper The Secrets of Notakto: Winning at X-only Tic-Tac-Toe by Thane Plambeck and Greg Whitehead.
To win at the three-board misère game on this web page, you must play first. The computer plays the perfect game and will win if it plays first or you make a mistake.
© 2019 Mark Huckvale