Event: 4-Board Division 1

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Opponent Rating Result
Jack Walker 1650 0 - 1
Phil Shaw 1225 ½ - ½
Ian Wells 963 1 - 0
Steve Hughes 1398 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1309 = (5236 + 400 * (1 - 1)) / 4)

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