Event: Division 1

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Opponent	Rating	Result
Phil R Watson	2141	0 - 1
AJ (Tony) Slinger	1955	½ - ½
Peter Shaw	2186	0 - 1
Mark W Rogerson	2089	0 - 1
Mark D Crowther	2146	0 - 1
AJ (Tony) Slinger	1918	½ - ½
Richard Porter	1880	½ - ½

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

1816 = (14315 + 400 * (0 - 4)) / 7)