Event: Broadland Chess Club Knockout

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Opponent	Rating	Result
Paul J Coppard	1257	1 - 0
Mervyn J Hughes	1882	½ - ½
Mervyn J Hughes	1882	0(def) - 1

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

1770 = (3139 + 400 * (1 - 0)) / 2)