Event: IM Brown Shield

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Opponent Rating Result
Martina Flint 1930 ½ - ½
Mark W White 2025 0 - 1
Dale H Cullum 1868 ½ - ½
Peter Shaw 2134 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1989 = (7957 + 400 * (1 - 1)) / 4)

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