Event: Bottom Half A&B Division

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Opponent	Rating	Result
Iain Mellis	1534	0 - 1
Nikhil Bhandari	1695	1 - 0
Gary Leighton	1517	½ - ½

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

1582 = (4746 + 400 * (1 - 1)) / 3)