Monthly record of yamamotomasato's rank (dan/kyu)
month dan/kyu win/lose win ratio
2014 /07 9.00 Kyu 1 win 0 lose 1.00
2014 /06 5.00 Kyu 5 win 5 lose .500
2014 /05 1.18 Kyu 15 win 12 lose .555
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