Event: Division 3

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Opponent	Rating	Result
Richard J F Caves	1413	0 - 1
Craig Bradshaw	1441	0 - 1
Vikram K Banerjee	1558	0 - 1
Raf Calumpiano	1282	0 - 1
Rob Davies	1364	0 - 1
Chris Hall	1450	1 - 0
Peter F Saunders	1317	1 - 0

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

1232 = (9825 + 400 * (2 - 5)) / 7)