Event: B Division

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Opponent	Rating	Result
Ajay Selvan	1519	½ - ½
P Ged Murphy	1480	1 - 0
Mark Turner	1437	1 - 0

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

1745 = (4436 + 400 * (2 - 0)) / 3)