Having been beaten at your favourite pencil and paper game, Noughts and Crosses, repeatedly by your friend, you decide to give up on your dreams of becoming Tic-Tac-Toe world champion.
However you come home to a note from your friend... (click for larger version)
Rolling your eyes at the 'xo' pun, you take a look at the note (google sheets link). A bunch of grids? Most of these don't even make sense!
But then again, you really want that world championship, so you should probably take all the advice you can get...
Solve the puzzle to get a bit of Tic-Tac-Toe advice!
Odd how only the first two columns of each grid has Xs in them... can you see why?