Event: Division 1

Opponent Rating Result
David A Talbot 1736 ½ - ½
Martyn Hamer 2154 0 - 1
Steve Whitehead 1825 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1638 = (5715 + 400 * (0 - 2)) / 3)

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Opponent Rating Result
David A Talbot 1740 1 - 0
Andrew Jaques 1946 ½ - ½
Andrew Hargreaves 1816 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1967 = (5502 + 400 * (1 - 0)) / 3)