Skill · no luck
Reversi
Place a disc so you trap and flip at least one row of your opponent. Most discs wins.
How to play
Every move must flip at least one disc. If you cannot, you pass. When nobody can move, the player with the most discs wins.
Stake 1 BT per player. Winner takes it, draw refunds both. You have 24h per move in async — miss it and you lose the match and your stake.