Event: EJCOA South Yorkshire U18/U16/U14

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Opponent	Rating	Result
Kirin Harrington	1345	0 - 1
Blake Whewell	1310	0 - 1
Ehsaan Ali	1074	0 - 1
Liam Arch	1188	0 - 1
Hugh Shipley	0	1 - 0

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

743 = (4917 + 400 * (1 - 4)) / 5)