BBC World Service - Discovery, Science Stories: Series 4, Alcuin of York
River Crossings (and Alcuin Numbers) - Numberphile - YouTube
Alcuin of York - Lighting up the Dark Ages with a bit of brain training - Yorkshire's Best Guides
In an old puzzle attributed to Alcuin of York (735–804), a f | Quizlet
Recreational mathematics | Scientific Gems
Charlemagne Surrounded By His Chief Officers, Received Alcuin Zip Pouch by Jules Laure - Pixels
Ancient Puzzles: Classic Brainteasers and Other Timeless Mathematical Games of the Last Ten Centuries: Olivastro, Dominic: 9780553372977: Amazon.com: Books
Alcuin and dialogue - The Art of Reasoning in Medieval Manuscripts
Alcuin | Scientific Gems
Puzzles in the (Virtual) Pub, York Festival of Ideas
Use your wits! Can you solve these fiendishly difficult puzzles? | Mathematics | The Guardian
Daily Medieval: Alcuin, Puzzle-master
What to do with your one wild and precious life: Alcuin's Answer - Brian Harris
River Crossings - JRMF
Charlemagne Surrounded By His Chief Officers, Received Alcuin iPhone 8 Case by Jules Laure - Pixels
Perilous Problems for Puzzle Lovers: Math, Logic & Word Puzzles to Challenge Your Brain (Alex Bellos Puzzle Books): Bellos, Alex: 9781615197187: Amazon.com: Books
Charlemagne and Alcuin. s1 Photograph by Historic illustrations - Fine Art America
Daily Medieval: The Liberal Alcuin of York
River crossing puzzle - Wikipedia
Perilous Problems for Puzzle Lovers Math, Logic & Word Puzzles to Chal – Gemini's Eclectic Emporium
Alcuinundrums: Seven brain teasers from the early Middle Ages – Thijs Porck
Puzzle | Definition, Origins, & Facts | Britannica
Alcuin's River Crossing Puzzles and Common Sense | Psychology Today United Kingdom
River Crossing Puzzle - Wolfram Demonstrations Project
Can You Solve Alcuin's Puzzles?
