The Japanese version of Microsoft Sudoku, called Microsoft Number Puzzle on the MS store, got a Windows 10 update that has a stackable 1k GS. This updated version is in Japanese, it apparently can't be switched to English, though the achievements pop in English. You'll need to change your Windows region to Japan to get it, just change it back afterward. If you already had the old version installed on your Win10 machine, it should've updated with to the new version. If you didn't finish the achievements in the Win8 version, you'll need to use a Win8 machine to complete it.
https://www.trueachievements.com/game/Microsoft-Sudoku-Japanese-Win-10/achievements
https://www.microsoft.com/ja-jp/p/microsoft-number-puzzle/9wzdncrfjb66?activetab=pivot
verviewtab
Some things carried over from the original, 200 GS Win8 version, but not everything did for me or some other people on TA. Auto-popped winning 12 Bronze medals for daily challenges, and am 9/10 on the Silvers and 1/8 on the Golds. I have the Bronze and Gold achievements for Win8, there was no Silver. Popped the achievement for completing all daily challenges in a month, but not the one for doing one challenge each day of a month.