Event: B Division

Opponent Rating Result
Brian Whitaker 1570 0 - 1
Chris Swales 1567 0 - 1
Iain Mellis 1583 ½ - ½
Geoffrey Howsden 1383 0 - 1
Luke Londesbrough 1456 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1352 = (7559 + 400 * (1 - 3)) / 5)

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