Event: Division 4

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Opponent	Rating	Result
Stephen Rumsby	1598	½ - ½
Abbie Stevens	1587	1 - 0
John Conway	1593	1 - 0
Roland Robson	1507	1 - 0
Anthony McCool	1360	½ - ½
Zainabkhan Bozhgulova	1955	0 - 1
Charlie Corden	1308	1 - 0
Martyn Hathaway	1331	1 - 0

performance = (sum(opponents ratings) + 400(wins-losses)) / games

1730 = (12239 + 400 * (5 - 1)) / 8)