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Dudeney puzzle (K3,3 bipartite graph): the houses cannot connect to the separate utilities such that no service pipes intersect Stock Photo - Alamy
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536 Puzzles & Curious Problems by Dudeney, Henry Ernest: used ; good hardcover with dust jacket (1967) | Robinson Street Books, IOBA
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536 Puzzles and Curious Problems (Dover Puzzle Books: Math Puzzles): Dudeney, Henry E., Gardner, Martin: 0800759796861: Amazon.com: Books
![a) The answer to Dudeney's haberdasher's puzzle (b) The corresponding... | Download Scientific Diagram a) The answer to Dudeney's haberdasher's puzzle (b) The corresponding... | Download Scientific Diagram](https://www.researchgate.net/publication/266993621/figure/fig1/AS:337194163163136@1457404761658/a-The-answer-to-Dudeneys-haberdashers-puzzle-b-The-corresponding-hinged-dissection.png)
a) The answer to Dudeney's haberdasher's puzzle (b) The corresponding... | Download Scientific Diagram
![a The answer to Dudeney's haberdasher's puzzle. b The solid triangle α... | Download Scientific Diagram a The answer to Dudeney's haberdasher's puzzle. b The solid triangle α... | Download Scientific Diagram](https://www.researchgate.net/publication/276395709/figure/fig11/AS:668444970188800@1536381108027/a-The-answer-to-Dudeneys-haberdashers-puzzle-b-The-solid-triangle-a-and-the-dashed.png)