Event: Division 2

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Opponent Rating Result
Martin G Smith 1967 ½ - ½
Chris C Sherwood 1972 ½ - ½
Ryan Colclough 1624 1 - 0
Joao AA Santos 1985 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1887 = (7548 + 400 * (1 - 1)) / 4)

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