Event: 4 Board League A

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Opponent Rating Result
Barry Thompson 1188 0 - 1
Angel A Gonzales 1641 0 - 1
Harry Wilson 0 0 - 1
Angel A Gonzales 1648 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

919 = (4477 + 400 * (1 - 3)) / 4)

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