Event: Ramsgate U100

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Opponent	Rating	Result
Christopher Exton	1090	1 - 0
John L Clarke	1329	1 - 0
Roy J McAloney	1324	1 - 0
Roy J McAloney	1324	0 - 1
Sam Feuillatre	1389	0 - 1
Christopher Exton	1090	1 - 0
Don Richards	1362	0 - 1
Don Richards	1362	0 - 1
Sam Feuillatre	1389	0 - 1
John L Clarke	1329	½ - ½

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

1259 = (12988 + 400 * (4 - 5)) / 10)