Event: A Division

Opponent Rating Result
Martin P McLoughlin 1820 ½ - ½
Joe McGinnis 1608 1 - 0
Kevin J Wilson 1944 ½ - ½
Paul D Perrett 1811 0 - 1
Dominic Leigh 1752 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1707 = (8935 + 400 * (1 - 2)) / 5)

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