Killer Sudoku with Roman Numerals

This variant combines the rules of Killer Sudoku with the look of Roman numerals. Cells display I, II, III…IX instead of digits 1–9, and the cage sums (the dashed regions in Killer) are also expressed in Roman numerals.

How it works

• The logic is the same as classic Killer: every row, column and 3×3 block contains each symbol exactly once, and each cage's cells must sum to the indicated value without repetitions inside the cage.
• Only the rendering changes. A cage summing to 17 is written XVII; a sum of 38 becomes XXXVIII. Translate mentally before deciding which values to try in the cage.
• To enter a digit use the 1–9 keyboard or tap the pad: the value displays as a Roman numeral, but the underlying logic stays integer-based.

Who it's for

Solvers who love logic puzzles and want an extra layer of mental translation: it's no longer enough to compute the sum, you have to read it first. A great way to slow down automatic visual recognition and approach each move with a moment of thought.

Have fun!