Monthly record of CentOS7's rank (dan/kyu)
month dan/kyu win/lose win ratio
2017 /06 6.00 Kyu 4 win 3 lose .571
2017 /05 4.45 Dan 21 win 9 lose .700
2017 /04 3.98 Dan 13 win 5 lose .722
2017 /03 2.00 Dan 11 win 1 lose .916
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