Event: Division 1

Opponent Rating Result
Michael Clarke 1850 0 - 1
Steve J Burge 1694 1 - 0
Michael I Williams 1717 0 - 1
Dave W Leeming 1706 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1742 = (6967 + 400 * (2 - 2)) / 4)

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