Event: B(2) Division

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Opponent	Rating	Result
Paul Keech	1774	0 - 1
Grieg Ichim	1572	1 - 0
Paul Doherty	1774	½ - ½

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

1707 = (5120 + 400 * (1 - 1)) / 3)