Event: Division 5

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Opponent Rating Result
Tim Twentyman 115 0 - 1
Peter Shaw 108 1 - 0
Les Hall 87 1 - 0
Martin J Chadwick 74 1 - 0
George P Jelliss 66 1 - 0
Peter Shaw 108 1 - 0
Anthony D Cooling 75 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

376 = (633 + 400 * (6 - 1)) / 7)

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