Event: Division Two

Opponent Rating Result
Peter L Loach 1677 1 - 0
Mark Bethel 1778 ½ - ½
Iain Brodie 1823 ½ - ½
Doruk Unver 1751 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1857 = (7029 + 400 * (1 - 0)) / 4)

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