Event: Div 2 - Weston Trophy

Opponent Rating Result
Alan S McIntosh 1810 ½ - ½
Stuart Crosthwaite 1935 0 - 1
Tom Hails 1690 1 - 0
John S Neely 0 0 - 1
Geoff Frost 1807 ½ - ½
Ken Hunter 1801 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1507 = (9043 + 400 * (2 - 2)) / 6)

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