Event: NSDCA Division 3

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Opponent	Rating	Result
Roger Coleman	1268	0 - 1
Martyn Stanley	1100	1 - 0
Oskar Jarzynski	1416	0 - 1
Mohammed Farah	1268	1 - 0
Ewan Corden	1256	1 - 0
Douglas J Barnett	1519	0 - 1
Matthew J Watson	1345	1 - 0
Jim Leech	1249	1 - 0

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

1403 = (10421 + 400 * (5 - 3)) / 8)