yall i have the cheat code to winning this
first up, on the first board, place an x on bottom or top right. then on the 3rd board place an x on the bottom or top left, after that on the middle board place an x in the middle for a diagonal
then new game on the first board and redo your diagonal on the second board to have a free x, same goes for the 3rd board, and from there, just dont play bad and you win