Event: Division Four

Opponent Rating Result
Mark E Tallis 1620 0 - 1
Joshua Skyrme 1533 ½ - ½
Paul Heeney 1450 0 - 1
John H Loynes 1448 1 - 0
Derek A Stockhall 1568 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1444 = (7619 + 400 * (1 - 2)) / 5)

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