Event: Division Four

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Opponent	Rating	Result
Peter Nixon	1435	1 - 0
Goran Stepanovic	1315	1 - 0
Steve Berry	1473	1 - 0(def)
John Lunn	1587	½ - ½
A (Tony) Taylor	1390	1 - 0
Peter J Hughes	1383	1 - 0
Mike J Johnson	1570	½ - ½

performance = (sum(opponents ratings) + 400(wins-losses)) / games

1713 = (8680 + 400 * (4 - 0)) / 6)