Event: Division Two

Opponent Rating Result
Philip J Briggs 2143 0 - 1
Raymond Carpenter 1867 ½ - ½
Okwose Marc Obi 1890 1 - 0
Jana M Bellin 1930 ½ - ½
Nathanael Kasafir 1861 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2018 = (9691 + 400 * (2 - 1)) / 5)

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