Event: Division Four

Opponent Rating Result
Peter JR Oliver 1645 ½ - ½
Paul J Evans 1705 ½ - ½
Peter Nixon 1435 1 - 0
Christopher J Evans 1736 ½ - ½
Lee E Collier 1782 ½ - ½
Mike Warden 1578 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1780 = (9881 + 400 * (2 - 0)) / 6)

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