Event: Division 2

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Opponent	Rating	Result
Alex Kent	1801	½ - ½
Jack Tye	1793	½ - ½
John W Kilmister	1799	1 - 0
Michael W Minshall	1489	½ - ½
Iain Bourne	1863	½ - ½
Julien Astier	1662	0 - 1
James Hennefeld	1751	0 - 1
Richard Collis	1513	½ - ½

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

1659 = (13671 + 400 * (1 - 2)) / 8)