Cane_Puzzles on X: "I just published my "Palindrome Secret Difference Sudoku X" puzzle on Logic Masters Germany! You can find it here: https://t.co/1OuEub5Vzt Have fun! https://t.co/RrrFlFihnj" / X
Sudoku Problem Series 50 : German Whisper - YouTube
SudokuWiki.org - Hidden Candidates
The Basics of Popular Sudoku Variants - by James Sinclair
Sudoku 16 x 16 Band 5 (German Edition): Badger, David: 9783954971183: Amazon.com: Books