Event: Division One

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Opponent Rating Result
Jenith AY Wiratunga 2022 ½ - ½
Daniel A Sparkes 1957 ½ - ½
Tim L Rogers 2054 0 - 1
Jenith AY Wiratunga 2066 ½ - ½
Stephen B James 2015 1 - 0
Richard M Webb 2217 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1989 = (12331 + 400 * (1 - 2)) / 6)

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