Event: A Division

Opponent Rating Result
H Michael Lamb 2090 ½ - ½
Allan W Beardsworth 2253 1 - 0
Paul Macklin 2343 ½ - ½
Robert McLean 2108 ½ - ½
Robert A Newton 1982 ½ - ½
D Brett Lund 2321 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2250 = (13097 + 400 * (1 - 0)) / 6)

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