Event: Walker Shield

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Opponent Rating Result
Sean Duffy 71 1 - 0
Andy Flood 115 0 - 1
Bob Wallace 100 1 - 0
Peter LT Blundell 115 0 - 1
Bob Wallace 100 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

180 = (501 + 400 * (3 - 2)) / 5)

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