ELI5: Explain Like I'm 5

Crossed O

Okay kiddo, have you ever played tic-tac-toe? Crossed O is a special type of tic-tac-toe game where instead of X's and O's, you use crosses (X's) and circles (O's). But, the way you win is a little different. Instead of getting three in a row like normal tic-tac-toe, you have to get three in a row but at an angle.

For example, imagine there was a line of three circles like this:
O
O
O

To win in crossed O, you could put a cross (X) over it like this:

X
X
X

See how the X's cross over the O's at an angle? That's what you need to do to win.

So, in summary, crossed O is a fun game that's like tic-tac-toe but you have to get three in a row at an angle instead of straight across.