Element-Sudoku Ferrum (Iron)

(Published on 22. August 2026, 10:28 by Zinker)

The normal Sudoku rules apply: in each row, each column, and each bold-outlined 3x3 box, the digits 1–9 must each appear exactly once.

Additionally:

Green spectral lines: Adjacent digits along any green spectral line differ by at least 5.

Blue spectral lines: The digits on each blue spectral line sum to the atomic number of iron in the periodic table of elements (for non-chemists: iron has atomic number 26).

Yellow atoms: Around an atom, all surrounding digits are either all even or all odd.

Electrons: Cells connected by a white electron contain consecutive digits. Cells connected by a black electron have a 1:2 ratio. Not all white and black electrons are given.

F-Puzzles-Link: F-Puzzles link Sudoku-Pad-Link: Sudoku-Pad link

Solution code: Row 9

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