Event: Worcestershire Challengers' League

Opponent Rating Result
Peter J Hughes 1435 1 - 0
Julie C Wilson 1800 0 - 1
Luke Barton 0 0 - 1
James Allsopp 1491 1 - 0
James Allsopp 1491 ½ - ½
David Cleak 1531 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1358 = (7748 + 400 * (3 - 2)) / 6)

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