Event: Walker Shield

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Opponent Rating Result
David Marsden 1409 1 - 0
Malcolm Snashall 1393 1 - 0
Martin Jordan 1180 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1727 = (3982 + 400 * (3 - 0)) / 3)

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Opponent Rating Result
David Erwee 1436 0 - 1
Vincent Larson 1333 1 - 0
Hanshuo Zhang 1331 0 - 1
Bob Wallace 1387 1 - 0
Graham Wilson 1168 1 - 0
Paul Verrall 1369 1 - 0
Martin Jordan 1180 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1372 = (9204 + 400 * (4 - 3)) / 7)