Event: Bloodworth Junior league

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Opponent	Rating	Result
Kieran Raine	68	1 - 0
Freddie Sansbury	0	1 - 0
James Gibbs	40	½ - ½

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

303 = (108 + 400 * (2 - 0)) / 3)