Event: B Division

Opponent Rating Result
Michael Joynes 1376 1 - 0
Richard J Harris 1726 0 - 1
Iain Mellis 1555 1 - 0
Stephen J jnr Roe 1640 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1674 = (6297 + 400 * (2 - 1)) / 4)

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