WebRTC 2-player 2048 on same board with matchmaking
instapainting.com
instapainting.com
Starting board: 103,044 players have made identical moves
After 1st move: 70,333 players have made identical moves
After 2nd move: 18,231 players have made identical moves
...
After 7th move: 3 players have made identical moves
After 8th move: You are unique - no other player has made the same 8 moves as you.
All kinds of neat data could be generated and turned into illustration of the branching over time and where each particular set of moves ends.
Whoever gets to 2048 first wins, or if no moves are left, whoever has the most points (added up value of all tiles on the board).