Event: Lewisham Club Championship

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Opponent	Rating	Result
Conrad Hall	1564	1 - 0
Mark M Robertson	2082	0 - 1
Matthew Helsby	1209	0 - 1

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

1485 = (4855 + 400 * (1 - 2)) / 3)