Event: Division 1

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Opponent	Rating	Result
Peter Biggs	1690	0 - 1
David King	1300	1 - 0
Myles Brunger	1500	0 - 1

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

1363 = (4490 + 400 * (1 - 2)) / 3)