422
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→2020 ...: typo fix
<span id="Maxima"></span>
=Chess Maxima=
* In 1950 [[Claude Shannon]] gave a conservative lower bound ([https://en.wikipedia.org/wiki/Shannon_number the Shannon number]) of the game-tree complexity of chess of 10^120 (possible games), and 10^43 for the amount of possible positions.<ref>[https://www.computerhistory.org/chess/doc-431614f453dde/ Programming a Computer for Playing Chess. download pdf from The Computer History Museum]</ref>
* In 1966, Eero Bonsdorff, [https://en.wikipedia.org/wiki/Karl_Fabel Karl Fabel], and Olvai Riihimaa gave 5899 as the maximum number of [[Moves|moves]] in a chess game <ref>Eero Bonsdorff, [https://en.wikipedia.org/wiki/Karl_Fabel Karl Fabel], Olvai Riihimaa ('''1966''') ''Schach und Zahl - Unterhaltsame Schachmathematik''. Seite 11-13, Walter Rau Verlag, Düsseldorf (German)</ref> <ref>[http://de.wikipedia.org/wiki/50-Z%C3%BCge-Regel#Schachmathematik 50-Züge-Regel - Schachmathematik from Wikipedia.de] (German)</ref> <ref>[http://www.xs4all.nl/~timkr/chess2/honor.htm Defending Humanity's Honor] by [https://en.wikipedia.org/wiki/Tim_Krabb%C3%A9 Tim Krabbé], see game [[Rival|NewRival]] - [[Faile]] with 493 moves, and playing 402 moves with bare kings!</ref>
* [[Shirish Chinchalkar]] has determined a [https://en.wikipedia.org/wiki/Game_complexity#State-space_complexity state-space complexity] of 10<span style="font-size: 80%; vertical-align: super;">46.25</span> as upper bound for the number of reachable [[Chess Position|chess positions]] <ref>[[Shirish Chinchalkar]] ('''1996'''). ''An Upper Bound for the Number of Reachable Positions''. [[ICGA Journal#19_3|ICCA Journal, Vol. 19, No. 3]]</ref>, [[John Tromp]] gives about 10^45.888 <ref>[http://tromp.github.io/chess/chess.html John's Chess Playground - Number of chess diagrams and positions]</ref> <ref>[http://www.talkchess.com/forum/viewtopic.php?t=51744&start=3 Re: Total possible chess positions?] by [[Álvaro Begué]], [[CCC]], March 26, 2014</ref>
* [[Dominik Klein]] ('''2021'''). ''[https://github.com/asdfjkl/neural_network_chess Neural Networks For Chess]''. [https://github.com/asdfjkl/neural_network_chess/releases/tag/v1.1 Release Version 1.1 · GitHub] <ref>[https://www.talkchess.com/forum3/viewtopic.php?f=2&t=78283 Book about Neural Networks for Chess] by dkl, [[CCC]], September 29, 2021</ref>
* [[Guy Haworth]] ('''2021'''). ''Chess without draws''. [[ICGA Journal#43_2|ICGA Journal, Vol. 43, No. 2]]
* [[Thomas McGrath]], [[Andrei Kapishnikov]], [[Nenad Tomašev]], [[Adam Pearce]], [[Demis Hassabis]], [[Been Kim]], [[Ulrich Paquet]], [[Vladimir Kramnik]] ('''2021'''). ''Acquisition of Chess Knowledge in AlphaZero''. [https://arxiv.org/abs/2111.09259 arXiv:2111.09259] » [[AlphaZero]] <ref>[https://en.chessbase.com/post/acquisition-of-chess-knowledge-in-alphazero Acquisition of Chess Knowledge in AlphaZero], [[ChessBase|ChessBase News]], November 18, 2021</ref>
* [[Miha Bizjak]], [[Matej Guid]] ('''2021'''). ''Automatic Recognition of Similar Chess Motifs''. [[Advances in Computer Games 17]]
* [[Nenad Tomašev]], [[Ulrich Paquet]], [[Demis Hassabis]], [[Vladimir Kramnik]] ('''2022'''). ''[https://cacm.acm.org/magazines/2022/2/258230-reimagining-chess-with-alphazero/fulltext Reimagining Chess with AlphaZero]''. [[ACM#Communications|Communications of the ACM]], Vol. 65, No. 2 » [[AlphaZero]]
=Forum Posts=
* [http://www.talkchess.com/forum3/viewtopic.php?f=7&t=77685 On the number of chess positions] by [[John Tromp]], [[CCC]], July 09, 2021 » [[Chess Position]]
* [https://www.talkchess.com/forum3/viewtopic.php?f=7&t=78464 Open Chess Game Database Standard (OCGDB)] by [[Pham Hong Nguyen|Nguyen Pham]], [[CCC]], October 20, 2021 » [[Databases|Chess Databases]]
'''2022'''
* [https://www.talkchess.com/forum3/viewtopic.php?f=7&t=77685&start=34 Re: On the number of chess positions] by [[John Tromp]], [[CCC]], April 02, 2022 » [[Chess Position]]
'''2023'''
* [https://talkchess.com/forum3/viewtopic.php?f=2&t=81858 The Next Big Thing in Computer Chess?] by [[Srdja Matovic]], [[CCC]], April 12, 2023 » [[Artificial Intelligence]], [[Programming]], [[Hardware]]
:[https://talkchess.com/forum3/viewtopic.php?f=2&t=81858&start=100#p951488 Re: The Next Big Thing in Computer Chess?] by [[Srdja Matovic]], [[CCC]], August 20, 2023
* [https://talkchess.com/forum3/viewtopic.php?f=2&t=82826 Is there any project coming to solve chess?] by Jouni, [[CCC]], November 06, 2023
=External Links=
