Event: Summer Rapid

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Opponent	Rating	Result
David A Hallen	1754	½ - ½
Harvey Murray-Smith	1427	1 - 0
Peter Hiscock	1570	1 - 0
Wesley J Vickers	1973	1 - 0
David E Shiers	1653	1 - 0
Joseph P Alcock	1579	0 - 1

performance = (sum(opponents ratings) + 400(wins-losses)) / games

1859 = (9956 + 400 * (4 - 1)) / 6)