Event: Doncaster League

Opponent Rating Result
John E Beech 1672 1 - 0
Patrick McGrath 0 1 - 0
Robert Bacon 1487 1 - 0
Paul Hagan 1271 1 - 0
Ian Farrow 1507 ½ - ½
John Smart 1685 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1537 = (7622 + 400 * (4 - 0)) / 6)

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