Event: IM Brown Shield

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Opponent Rating Result
Alastair Speirs 1382 0 - 1
Roger Keely 1713 0 - 1
Vivien Webster 1704 1 - 0
Chris R Tinker 1687 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1622 = (6486 + 400 * (2 - 2)) / 4)

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