Event: Division Four

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Opponent Rating Result
Gavin Maciel 1750 0 - 1
Ionut Florin Valea 1585 ½ - ½
Derek A Stockhall 1578 0 - 1
Peter S Banks 1638 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1538 = (6551 + 400 * (1 - 2)) / 4)

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