Event: Walker Shield

Opponent Rating Result
Thomas E Simpson 1530 0 - 1
Clive J Le Baigue 1490 1 - 0
Kenneth Keeler 1419 0 - 1
Kenneth Keeler 1419 ½ - ½
Leon A Garfield 1451 0 - 1
Graeme Boxall 1422 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1322 = (8731 + 400 * (1 - 3)) / 6)

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