Event: Bottom Half A&B Division

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Opponent	Rating	Result
Harry Tennant	1543	0 - 1
Joe McGinnis	1679	1 - 0
Keith Harrison	1594	½ - ½

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

1605 = (4816 + 400 * (1 - 1)) / 3)