Editing Chess (section)

====Applied mathematics====
A novel methodology in [[steganography]] explores the use of chess-based covers (such as puzzles, chess problems, game reports, training documents, news articles, etc.) for concealing data within a selection of {{Chessgloss|move|moves}}, each hiding some [[bit]]s.<ref>{{cite journal |last1=Desoky |first1=Abdelrahman |last2=Younis |first2=Mohamed |title=Chestega: chess steganography methodology |journal=Security and Communication Networks |date=November 2009 |volume=2 |issue=6 |pages=555–566 |doi=10.1002/sec.99 |doi-access=free }}</ref><ref>{{cite journal |last1=Hernandez-Castro |first1=Julio C. |last2=Blasco-Lopez |first2=Ignacio |last3=Estevez-Tapiador |first3=Juan M. |last4=Ribagorda-Garnacho |first4=Arturo |title=Steganography in games: A general methodology and its application to the game of Go |journal=Computers & Security |date=February 2006 |volume=25 |issue=1 |pages=64–71 |doi=10.1016/j.cose.2005.12.001 }}</ref> Several proof-of-concept projects have been developed that convert text or files into [[binary code]], which is then converted into a series of legal chess moves, that can then be [[Decryption|decrypted]] and downloaded.<ref>{{Cite web |last=Mukherjee |first=Nayanika |date=15 September 2024 |title='I turned Lichess into Google Drive': 18yo shows how to store files, secret messages in a game of chess |url=https://indianexpress.com/article/puzzles-and-games/info/chess-games-cloud-storage-creative-coding-cryptography-brainteasers-9567020/ |access-date=28 January 2025 |newspaper=[[The Indian Express]]}}</ref>

[[Correspondence chess]] has been historically suspected of being a potential steganographic medium. [[Melville Davisson Post]] documented a [[chess problem]] that was used to create a pictorial [[cipher]] during [[World War I]].<ref>{{Cite magazine |last=Post |first=Melville Davisson |author-link=Melville Davisson Post |date=January 1918 |title=German War Ciphers |hdl=2027/uiug.30112077173703?urlappend=%3Bseq=626%3Bownerid=13510798903194481-672 |hdl-access=free |magazine=[[Everybody's Magazine]] |volume=38 |number=1 |pages=28–34 }}</ref><ref>{{Cite magazine |last=Oberhaus |first=Daniel |date=25 March 2017 |title=The Spy Who Checkmated Me: Why Postal Chess Was Banned During Wartime |url=https://www.vice.com/en/article/the-spy-who-checkmated-me-why-postal-chess-was-banned-during-wartime/ |access-date=28 January 2025 |magazine=[[Vice (magazine)|Vice]]}}</ref> During [[World War II]], extensive [[postal censorship]] was imposed on [[military personnel]] from the United States and Canada that made playing correspondence chess impossible, arising from suspicion that chess could be used to send secret messages to the enemies.<ref>{{Cite magazine |last=Dubois |first=Joan |date=September 1991 |title=Golden Knights in Review |url=https://uscf1-nyc1.aodhosting.com/CL-AND-CR-ALL/CL-ALL/1991/1991_09.pdf#page=40 |magazine=[[Chess Life]] |pages=40–45 |via=[[US Chess Federation]] |volume=46 |number=9}}</ref>