JAPR is a living rating — computed from every game you play across every Junkies event, not a one-time score. Everyone starts at 3.50 and earns their number from results.

• Opponent-aware. Beating a stronger pair moves you up more; a tight loss to a strong pair barely dents you. Win–loss matters most.
• Blowouts matter. Run the score up — an 11–2 beatdown moves ratings about 2× as much as an 11–9 squeaker.
• Event weight. Bracket playoff games count most (1.5×), pool play standard (1.0×), Versus-day mixers less (0.5×).
• Always current. Log a new event and every rating recalculates from the full history. New players seed at 3.50 and sharpen with each game.

Both players on a team get the same Δ (winners move up, losers down by the same amount). Ratings tighten around 3.50 early and spread out as more games are logged.