Event: Summer Rapidplay

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Opponent	Rating	Result
Alex Jamieson	1476	1 - 0
Iain Mellis	1650	0 - 1
Sam Stevenson	1183	0 - 1

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

1303 = (4309 + 400 * (1 - 2)) / 3)