Logic Masters Deutschland e.V.

So Scojo launched a prompt to make a puzzle using Dutch whisper lines, and here I'm pairing them with a Literal twist to global entropy.

• Normal sudoku rules apply.
• Globally English Literal: Every 2x2 area of the grid must have at least three digits with different number of letters in their english name, i.e. at least one digit from each of the sets {126}, {378} and {459}.
• Adjacent digits along an orange line must have a difference of at least 4.

Online in Sudokupad

See also:

• polyline polyglot
• bougainvilliers bétacyanines