Event: Division 2

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Opponent	Rating	Result
Chris S Goodall	1975	½ - ½
John Liddle	1812	½ - ½
Marcos Caso Huerta	1968	0 - 1
Kevin Rowden	1755	0 - 1
Geoff Loxham	1715	0 - 1
Brian Towers	1912	½ - ½
Geoff Loxham	1697	½ - ½
Martin Beardsley	1705	½ - ½
Mick D Riding	1961	½ - ½

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

1700 = (16500 + 400 * (0 - 3)) / 9)