Event: Division 1

Opponent Rating Result
Jan Balogh 1963 1 - 0
Norman A Hutchinson 1970 1 - 0
Gilad Kalchheim 2099 ½ - ½
Alan Richardson 1955 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2197 = (7987 + 400 * (2 - 0)) / 4)

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