Event: Division 1

Opponent Rating Result
Andrew A Clarkson 1998 0 - 1
Clive Edwards 1789 ½ - ½
Tom Ormisher 1586 1 - 0
John Whitfield 1801 1 - 0
Andrew Hargreaves 1801 ½ - ½
Yousaf Ahmed 1451 1 - 0
Ronnie Whiteside 1743 ½ - ½
Andrew Hargreaves 1808 ½ - ½
Andrew Jaques 1943 0 - 1
Martin Baxter 1664 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1838 = (17584 + 400 * (4 - 2)) / 10)

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