Monthly record of oba257's rank (dan/kyu)
month dan/kyu win/lose win ratio
2020 /03 1.05 Kyu 19 win 17 lose .527
2020 /02 1.11 Kyu 12 win 10 lose .545
2018 /10 9.00 Kyu 1 win 1 lose .500
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