Event: Bottom Half A&B Division

Opponent Rating Result
Iain Mellis 1534 ½ - ½
Dave Frank 1516 1 - 0
Stephen Ollis 1492 0 - 1
Nikhil Bhandari 1695 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1459 = (6237 + 400 * (1 - 2)) / 4)

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