Event: Division 2

Opponent Rating Result
David W Daniels 1840 0 - 1
Steve Whatmore 1884 ½ - ½
Brian Homewood 1611 0 - 1
Liam O'Connor 1568 ½ - ½
Brian Homewood 1611 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1623 = (8514 + 400 * (1 - 2)) / 5)

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