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KPK
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==KPK is won==
* Stronger king defends '''all''' [[Stop squareSquare|stop]] and [[Pawn Spans#StopandDistantStop|telestop(s)]], including the [[Promotion Square|promotion square]] up to three squares. With defender to move, one has to consider whether the pawn can be captured, since defended stop square does not necessarily imply the pawn is defended as well. Additionally, there is a [[Stalemate|stalemate]] [https://en.wikipedia.org/wiki/Key_square#An_exception exception] with the knight pawn.
* Defending king is (leaves after moving) outside the [[Rule of the Square#TheSquareofthePawn|square of the pawn]] <ref>[[King Pattern#SetwiseRuleoftheSquare|Set-wise Rule of the Square]] with [[Bitboards]]</ref>
: if the own king blocks the [[Pawn Spans|frontspan]], it is still won. However the defending king may further reach the "square of the pawn" due to the extra [[Tempo|tempo]] and one needs to apply some more rules to avoid knowledge holes in that cases.
* [[Mike Clarke]] ('''1977'''). ''A quantitative study of KPK''. [[Advances in Computer Chess 1]], pp. 108-118
* [[Pericles Negri]] ('''1977'''). ''Inductive Learning in a Hierarchical Model for Representing Knowledge in Chess End Games''. [http://www.mli.gmu.edu/papers/69-78/77-2.pdf pdf]
* [[Ryszard Michalski]] and , [[Pericles Negri]] ('''1977'''). ''An experiment on inductive learning in chess endgames''. [http://www.doc.ic.ac.uk/~shm/MI/mi8.html Machine Intelligence 8], [http://www.mli.gmu.edu/papers/69-78/77-1.pdf pdf]
* [[Max Bramer]] ('''1978'''). ''A Note on KPK.'' Technical Report, the [https://en.wikipedia.org/wiki/Open_University Open University]: Faculty of Mathematics, [https://en.wikipedia.org/wiki/Milton_Keynes Milton Keynes], England.
==1980 ...==
* [[Don Beal]], [[Mike Clarke]] ('''1980'''). ''The Construction of Economical and Correct Algorithms for King and Pawn against King''. [[Advances in Computer Chess 2]]
* [[Max Bramer]] ('''1980'''). ''An Optimal Algorithm for KPK using Pattern Knowledge.'' [[Advances in Computer Chess 2]]
* [[Alen Shapiro]], [[Tim Niblett]] ('''1982'''). ''Automatic Induction of Classification Rules for Chess End game.'' [[Advances in Computer Chess 3]]
* [[David Slate]] ('''1984'''). ''Interior-node Score Bounds in a Brute-force Chess Program.'' [[ICGA Journal#7_4|ICCA Journal, Vol. 7, No. 4]]
* [[Ard van Bergen]] ('''1985'''). ''An Ulti-Mate Look at the KPK Data Base''. [[ICGA Journal#8_4|ICCA Journal, Vol. 8, No. 4]]
==1990 ...==
* [[Guy Haworth]], [[Meel Velliste]] ('''1998'''). ''[http://centaur.reading.ac.uk/4569/ Chess Endgames and Neural Networks]''. [[ICGA Journal#21_4|ICCA Journal, Vol. 21, No. 4]]
* [[Ulrich Thiemonds]] ('''1999'''). ''Ein regelbasiertes Spielprogramm für Schachendspiele''. [https://en.wikipedia.org/wiki/University_of_Bonn University of Bonn], [https://en.wikipedia.org/wiki/Diplom Diplom] thesis, [httphttps://www.iai.uni-bonn.de/~idb/diplomarbeiten/thiemonds99.ps.gz zipped ps], [http://idb.informatik.uni-bonn.de/publications/da/da_thiemonds_1999.pdf pdf] (German) <ref>[http://idb.informatik.uni-bonn.de/publications/DA Diploma Theses — IDB]</ref> <ref>[http://www.iai.uni-bonn.de/~idb/ehemaligedipl.html Uni Bonn - AG Intelligente Datenbanken - Was sind intelligente Datenbanken?]</ref>
=Forum Posts=
==2005 ...==
* [http://www.talkchess.com/forum/viewtopic.php?t=14578 Is this rule safe (how has K&Ps vs K&Ps databases? ...)] by [[Mark Lefler]], [[CCC]], June 20, 2007 » [[Now]], [[Pawn Endgame]]
==2010 ...==
* [http://www.talkchess.com/forum/viewtopic.php?t=46651 KPK] by [[Ed Schroder|Ed Schröder]], [[CCC]], December 30, 2012
* [http://www.talkchess.com/forum/viewtopic.php?t=46893 KPK bitbase] by [[Maarten Bults]], [[CCC]], January 16, 2013
* [http://www.talkchess.com/forum/viewtopic.php?t=47557 How to implement KPK ?] by [[Rasjid Chan]], [[CCC]], March 21, 2013
==2015 ...==
* [http://www.talkchess.com/forum/viewtopic.php?t=57517 Yet another KPK endgame table generator: pfkpk] by [[Marcel van Kervinck]], [[CCC]], September 05, 2015 » [[Endgame Bitbases]] <ref>[https://github.com/kervinck/pfkpk kervinck/pfkpk · GitHub]</ref>
* [http://www.talkchess.com/forum/viewtopic.php?t=59928 Test position that requires KKP evaluation] by [[Shawn Chidester]], [[CCC]], April 22, 2016
* [http://www.talkchess.com/forum/viewtopic.php?t=60151 kpk bitbase, worthless?] by [[Alexandru Mosoi]], [[CCC]], May 12, 2016
* [http://www.talkchess.com/forum3/viewtopic.php?f=7&t=70815 Eucalyptus - KPK Bitbases Generator] by [[Toni Helminen]], [[CCC]], May 24, 2019
* [http://www.talkchess.com/forum3/viewtopic.php?f=7&t=70942 The Poor Man's KP Bitbase] by [[Dennis Sceviour]], [[CCC]], June 07, 2019
==2020 ...==
* [http://www.talkchess.com/forum3/viewtopic.php?f=7&t=77499 Syzygy bases from memory] by [[Ed Schroder|Ed Schröder]], [[CCC]], June 16, 2021 » [[Syzygy Bases]]
=External Links=
