Event: B Division

Opponent Rating Result
Michael Joynes 1376 1 - 0
Iain Mellis 1555 1 - 0
Stephen J jnr Roe 1640 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1790 = (4571 + 400 * (2 - 0)) / 3)

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