Event: Division 1

Opponent Rating Result
Peter Shaw 2101 ½ - ½
Callum Welsh 1939 ½ - ½
Mohammad Abdulhamid 1768 ½ - ½
Richard Porter 1871 0 - 1
Phil R Watson 2159 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1888 = (9838 + 400 * (0 - 1)) / 5)

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