Event: Woodhouse Cup

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Opponent	Rating	Result
M Paul Townsend	2205	0 - 1
Mark W White	2003	1 - 0
Tim P Wall	2254	0 - 1

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

2021 = (6462 + 400 * (1 - 2)) / 3)