More plays for longer time means better buff. Balance something that encourages people to have a game of chess before going out, but isn't too OP or lamely gameable.

• May expand to the idea of generating "Flow" which can have numerous temporary positive effects
• Player buffs on mining speed, regen, combat, safe-falling
• "Bonemealing" nearby plantlife
• Making animals breed

Darren suggested giving XP upon winning and tying it to resetting, which costs XP (unless the game is done). More XP for winning than for resetting, slightly? Also maybe scale the XP with the Elo rating (#28). I like this idea.