Event: Division 4

Opponent Rating Result
Tim Bland 1356 0 - 1
Christine Coates 1280 ½ - ½
Keith Scott 1458 ½ - ½
William Purle 1550 0 - 1
Graham J Andrews 1572 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1203 = (7216 + 400 * (0 - 3)) / 5)

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