Event: Ipswich Chess Club Championship

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Opponent	Rating	Result
Martyn Colebrook	1512	1 - 0
John Broadwater	0	1 - 0
Yaroslav Orishko	2014	0 - 1

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

1309 = (3526 + 400 * (2 - 1)) / 3)