Event: Walker Shield

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Opponent Rating Result
Leon A Garfield 1480 0 - 1
I Redmond 1315 0 - 1
Bob Wallace 1470 0 - 1
Matthew Causer 1350 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1004 = (5615 + 400 * (0 - 4)) / 4)

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