Event: Division 3

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Opponent	Rating	Result
Jon EW Blackburn	139	1 - 0
Neville S Jones	105	1 - 0
Stephen G Wootton	121	½ - ½

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

388 = (365 + 400 * (2 - 0)) / 3)