Event: U1640 Tournament

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Opponent	Rating	Result
Antony Holgate	850	1 - 0
David J Gibson	1573	1 - 0
Dominik Pitel	1352	0 - 1

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

1392 = (3775 + 400 * (2 - 1)) / 3)