Monthly record of Istom's rank (dan/kyu)
month dan/kyu win/lose win ratio
2023 /07 9.00 Kyu 1 win 1 lose .500
2023 /01 0.07 Kyu 18 win 16 lose .529
2022 /05 5.00 Kyu 5 win 8 lose .384
2020 /10 4.00 Kyu 6 win 7 lose .461
2019 /08 8.00 Kyu 2 win 5 lose .285
2018 /09 3.00 Kyu 7 win 5 lose .583
2018 /08 7.00 Kyu 3 win 5 lose .375
2018 /06 1.49 Dan 31 win 31 lose .500
2018 /05 1.69 Dan 46 win 43 lose .516
2018 /04 1.60 Dan 50 win 31 lose .617
2018 /03 0.10 Kyu 20 win 18 lose .526
2018 /02 1.00 Kyu 9 win 9 lose .500
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