Thank you for watching! Here's where you can find all of the resources I used while developing this video, in order of first appearance/mention. I've chosen not to provide separate digital versions of any puzzles from this video unless those versions already existed online, out of respect for authors who have various preferences regarding the reproduction of their work.

Surplus Sudoku by Sam CapplemanLynes: https://sudokupad.app/psjf783z0m
Deficit Sudoku by Cliff the Crafter: https://sudokupad.app/p3e486rhl4
GMPuzzles/The Art of Puzzles: https://gmpuzzles.com/blog
Greater Than Sudoku by Rishi Puri: https://sudokumaniacs.com/playgame.ph...
Instruction Booklet, 5th World Sudoku Championship (Philadelphia 2010): https://wpc.puzzles.com/wsc2010/downl...
Futoshiki: https://en.wikipedia.org/wiki/Futoshiki ; https://www.futoshiki.com/
Parquet Sudoku by Richard Stolk: https://logicmasters.de/Raetselporta...
Sudoku Mahabharat 2022, Round 4 (Nityant Agarwal and James Peter): https://logicmastersindia.com/live/ma...
Mutant Sudoku by Thomas Snyder and WeiHwa Huang: https://www.amazon.com/MutantSudoku...
blog entry, '2007 World Sudoku Championships' by Tom Collyer: https://tcollyer.blogspot.com/2007/04...
US Sudoku Qualifier 2023 Instruction Booklet (puzzles by WeiHwa Huang and David Altizio): https://wpc.puzzles.com/ussq2023/down...
Sudoku Masterpieces by WeiHwa Huang and Thomas Snyder: https://www.amazon.com/SudokuMasterp...
Pencilmark Sudoku by Bill Murphy: https://sudokupad.app/suwhx7z7bd
Instruction Booklet, 1st World Sudoku Championship (Lucca 2006): https://wsc2006.com/pdf/booklet_int.pdf
2019 Sudoku Grand Prix, Round 2 (puzzles by Jan Mrozowski et. al.): https://gp.worldpuzzle.org/sites/defa...
2015 Sudoku Grand Prix, Round 4 (puzzles by Jan Mrozowski): https://gp.worldpuzzle.org/sites/defa...
2019 Sudoku Grand Prix, Round 5 (puzzles by Nikola Zivanovic et. al.): https://gp.worldpuzzle.org/sites/defa...