Event: Ilkley Chess Club Championship

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Opponent	Rating	Result
William Boothman	149	1 - 0
Stuart M Johnson	114	1 - 0
C Barry Taylor	135	0 - 1
Peter D Ward	0	½ - ½
Chris Wright	168	½ - ½
Robert Derrington	0	1 - 0
Lee Crawford	147	0 - 1

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

159 = (713 + 400 * (3 - 2)) / 7)