Overview
Be the first to play 5 in a row OR put your opponent in a position where they cannot play
Turn
Place a piece horizontally or vertically to the previously placed piece, as far as you like, but as long as no other pieces are between the two
Game End
The game ends when a player makes 5 in a row either vertically, horizontally OR diagonally
Alternatively, a player loses when they can't make a legal play