Event: Walker Shield

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Opponent Rating Result
Kenneth Keeler 91 0 - 1
Susan Green 52 1 - 0
George Allen 36 1 - 0
James K Maskell 74 1 - 0
David Seunarine 33 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

297 = (286 + 400 * (4 - 1)) / 5)

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