Event: Ramsgate U100

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Opponent	Rating	Result
Christopher Exton	1090	1 - 0
Roy J McAloney	1324	0 - 1
Don Richards	1362	0 - 1
Brian W Williamson	1310	0 - 1
Christopher Exton	1090	1 - 0
Roy J McAloney	1324	0 - 1
Sam Feuillatre	1389	1 - 0
Don Richards	1362	½ - ½
Sam Feuillatre	1389	1 - 0
Brian W Williamson	1310	½ - ½

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

1295 = (12950 + 400 * (4 - 4)) / 10)