Event: GP4 - December

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Opponent Rating Result
Stephen D Blewitt 1932 0 - 1
Howard L Tebbs 2023 0 - 1
David Slidel 1197 1 - 0
Oliver Balp 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1088 = (5152 + 400 * (1 - 3)) / 4)

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