Event: NSDCA Division 1

Opponent Rating Result
Stephen J Emmerton 1564 ½ - ½
Geoff Laurence 1708 1 - 0
Alan E Thomason 1707 0 - 1
David Lambton 1800 0 - 1
John P Ewens 1917 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1659 = (8696 + 400 * (1 - 2)) / 5)

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