Event: Bottom Half A&B Division

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Opponent	Rating	Result
Stephen Ollis	1492	½ - ½
Thomas Marwood	1649	1 - 0
Paul Weightman	1569	½ - ½

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

1703 = (4710 + 400 * (1 - 0)) / 3)