Event: Division 4

Opponent Rating Result
Mike Herbert 145 0 - 1
Gary RF Bosworth 132 1 - 0
Michael J Harper 121 0 - 1
Stephen Morley 93 1 - 0
Nigel D Marshall 115 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

121 = (606 + 400 * (2 - 2)) / 5)

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