Event: Summer League Division 4

Opponent Rating Result
David Burn 1508 0 - 1
Michael W Simmons 1166 ½ - ½
Howard Cooper 1542 ½ - ½
James Airey 1274 0 - 1
Joseph Hammond 1346 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1127 = (6836 + 400 * (0 - 3)) / 5)

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