Event: 6th Somerset New Year Major

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Opponent	Rating	Result
Stephen Tatlow	0	½ - ½
Bernie Tedd	1881	1 - 0
Colin J Davis	1984	0 - 1
Rob Fursman	1760	½ - ½

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

1406 = (5625 + 400 * (1 - 1)) / 4)