Event: Bak

Opponent Rating Result
Jatinder Singh 1314 0 - 1
Barry Thompson 1219 1 - 0
Kenneth L Marsden 1378 0 - 1
Andrew Walker 1393 0 - 1
Haabeel Shah 1286 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1078 = (6590 + 400 * (1 - 4)) / 5)

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