Game
Disappearing Tic-Tac-Toe
Three-in-a-row that never fills the board. After your third mark, each new move erases your oldest — so every game keeps shifting.
Classic three-in-a-row — with a twist. Each side may only keep 3 marks. Place a fourth and your oldest mark disappears.
You are X. Only three marks stay on the board — your oldest fades when you place a fourth.