An entry in Fortnightly Topic Challenge #47: "Wacky Sudokus"
(h/t to Beastly Gerbil, whose 1,2,3... Trinary!!! puzzle provided inspiration for this puzzle)
This puzzle is a normal Sudoku, with each digit from 1-9 appearing once per row and column, and once in each square. The variation is in the clues; each clue is a consecutive substring of the Roman numeral expansion of the digit in the cell. There's no funny business: the Roman numeral for 4 is only IV, not IIII, and the substrings are given in order. As an example the clue "VI" cannot represent 4, but could represent 6, 7, or 8. I hope you enjoy!
TEXT VERSION
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║ |I I| ║ V | V | ║I V| |I I║
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║III| |I I║V I| | ║I I|I I| ║
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║V I| V | ║ |I I| ║ |III| V ║
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║ X | | V ║ | | V ║ |I I|VII║
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║ | |V I║ |I I| V ║ | X | ║
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║I I| | ║ X | | V ║ V | |I I║
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║III| | ║ I | I |I I║ V | | ║
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║ V | |VII║ I | | X ║ V | | V ║
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║VII| | V ║III|I I|III║ V | V | ║
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