Monthly record of black21bb's rank (dan/kyu)
month dan/kyu win/lose win ratio
2017 /02 9.00 Kyu 1 win 0 lose 1.00
2015 /12 9.00 Kyu 1 win 0 lose 1.00
2015 /09 9.00 Kyu 1 win 2 lose .333
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