Event: Division 4

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Opponent	Rating	Result
Piers Hinds	0	0 - 1
Leo Beacroft	1455	0 - 1
Jos Dent	1329	1 - 0

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

795 = (2784 + 400 * (1 - 2)) / 3)