Missing Deck Puzzles is the joint effort of two long-time friends, FullDeck and Missing a Few Cards. FullDeck only recently started playing with a complete pack of cards, while Missing a Few Cards used to play with a full deck but is now dealing from a reduced pack. Both have been eager consumers of puzzles of all types since childhood and now enjoy solving and setting sudoku puzzles together. In our quotidian lives, we are both math professors at Clemson University, going by the more mundane names of Neil Calkin and Eliza Gallagher. We regularly teach courses on variant sudoku and other puzzles. In keeping with the Hardy-Littlewood Axioms of Collaboration, all of our puzzles are listed as being by FullDeck and Missing a Few Cards, or occasionally as Missing-Deck, regardless of who took the lead on setting the puzzle.
In the complete archive, you will find most of the puzzles we have set and many of the puzzles our students have set, with newer puzzles at the top. The archive is organized into categories and is searchable by puzzle name, constraint, difficulty, or other key words that appear in the puzzle description. Every puzzle has a unique solution that can be reached logically from the starting clues without any guessing. Each has a link so that you can try solving it in the SudokuPad App created by Sven Neumann.