Event: Hull CC Championship

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Opponent	Rating	Result
Keith Thompson	0	0 - 1
Bryan Hesler	1720	0 - 1
Dave M Cooper	1555	0 - 1
Jason Clemmey	1345	0 - 0
John Burton	1263	0 - 1

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

735 = (4538 + 400 * (0 - 4)) / 4)