Event: Wahltuch

Opponent Rating Result
Allan Gardner 1872 1 - 0
R Mark Hann 2035 ½ - ½
Mike J Surtees 2150 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2019 = (6057 + 400 * (1 - 1)) / 3)

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