Event: Croydon Shield

Opponent Rating Result
Robin W Haldane 2076 1 - 0
John Merriman 2347 0 - 1
Robin W Haldane 2076 1 - 0
Ian L Snape 2183 ½ - ½
Ian L Snape 2183 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2253 = (10865 + 400 * (2 - 1)) / 5)

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