Event: Division 2

Opponent Rating Result
John E Fryer 1481 0 - 1
John Moughtin-Leay 1424 1 - 0
Roger Bray 1530 0 - 1
Luke Sullivan 1546 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1395 = (5981 + 400 * (1 - 2)) / 4)

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