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John Roycroft

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Created page with "'''Home * People * John Roycroft''' FILE:JohnRoycroft1988inSaxony.jpg|border|right|thumb| John Roycroft, 1988 <ref>John Roycroft in the [https://en.wikipe..."
'''[[Main Page|Home]] * [[People]] * John Roycroft'''

[[FILE:JohnRoycroft1988inSaxony.jpg|border|right|thumb| John Roycroft, 1988 <ref>John Roycroft in the [https://en.wikipedia.org/wiki/Elbe_Sandstone_Mountains Elbe Sandstone Mountains] ([https://en.wikipedia.org/wiki/Saxony Saxony]), during a trip of the participants of a chess course held 1988 in [https://en.wikipedia.org/wiki/Dresden Dresden]. Photo by [[Rainer Staudte]], [https://en.wikipedia.org/wiki/Wikimedia_Commons Wikimedia Commons]</ref> ]]

'''Arthur John Roycroft''', (born July 25, 1929)<br/>
an English chess [[Chess Problems, Compositions and Studies|endgame study composer]], international judge, and author. He is co-founder and member of the Chess Endgame Study Circle, founded on March 16, 1965, publishing the studies magazine [https://en.wikipedia.org/wiki/EG_%28magazine%29 End Game (EG)] <ref>[http://www.gadycosteff.com/eg/eg.html EG issues 1-152]</ref> . Roycroft was its publisher for the first 102 issues, from July 1965 until 1991.
Since then, the [https://en.wikipedia.org/wiki/Flemish Dutch-Flemish] ARVES, the ''[https://en.wikipedia.org/wiki/Alexander_Rueb Alexander Rueb] Vereniging voor Schaakeindspelstudie'' <ref>[http://www.arves.org/English/index.htm Alexander Rueb Vereniging voor SchaakEindspelStudie - Dutch-Flemish Association for Endgame Study]</ref> has been publisher, but Roycroft stayed as editor-in-chief until 2007, superseded by [[Harold van der Heijden]] <ref>[https://en.wikipedia.org/wiki/EG_%28magazine%29 EG (magazine) from Wikipedia]</ref>. Roycroft's adaptation of the [[Richard K. Guy|Guy]]–[https://en.wikipedia.org/wiki/Hugh_Blandford Blandford] code in the 70s resulted in the [https://en.wikipedia.org/wiki/GBR_code GBR code], an efficient way to index any chess position, in particular endgame studies <ref> [[John Roycroft]] ('''1984'''). ''The GBR code''. [[ICGA Journal#7_1|ICCA Journal, Vol. 7, No. 1]]</ref>.

=Endgame Tablebases=
John Roycroft advised [[Ken Thompson]] in [[Endgame Tablebases|endgame tablebases]] generation with four and five pieces.
For queen and pawn against queen he published some results in 1986, years ahead of full tablebase output on CD <ref>[https://en.wikipedia.org/wiki/John_Roycroft John Roycroft from Wikipedia]</ref> <ref>[[Jaap van den Herik]] ('''1986'''). ''Roycroft's 5-Man Chess Endgame Series''. [[ICGA Journal#9_3|ICCA Journal, Vol. 9, No. 3]]</ref> .

=Selected Publications=
<ref>[http://ilk.uvt.nl/icga/journal/docs/References.pdf ICGA Reference Database] (pdf)</ref>
==1970 ...==
* [[John Roycroft]] ('''1972'''). ''Test tube chess''. Stackpole Books
==1980 ...==
* [[John Roycroft]] ('''1981'''). ''The Chess Endgame Study''. [https://en.wikipedia.org/wiki/Dover_Publications Dover Publications]
* [[John Roycroft]] ('''1983'''). ''A Prophecy Fulfilled''. [https://en.wikipedia.org/wiki/EG_%28magazine%29 EG], Vol. V, No. 74
* [[John Roycroft]] ('''1984'''). ''The GBR code''. [[ICGA Journal#7_1|ICCA Journal, Vol. 7, No. 1]] <ref>[https://en.wikipedia.org/wiki/GBR_code GBR code from Wikipedia]</ref>
* [[John Roycroft]] ('''1984'''). ''Two Bishops against Knight''. [https://en.wikipedia.org/wiki/EG_%28magazine%29 EG], Vol. 5, No. 75
* [[John Roycroft]] ('''1984'''). ''A Proposed Revision of the ‘50-Move Rule’''. [[ICGA Journal#7_3|ICCA Journal, Vol. 7, No. 3]]
* [[John Roycroft]] ('''1985'''). ''Chess-Endgame Data-Base`Oracles': Necessary and Desirable Features''. [[ICGA Journal#8_2|ICCA Journal, Vol. 8, No. 2]]
* [[John Roycroft]], [[Ken Thompson]] ('''1986'''). ''Queen and Pawn on a2 against Queen''. Chess Endgame Consultants and Publishers, London
* [[John Roycroft]], [[Ken Thompson]] ('''1986'''). ''Queen and Pawn on a6 against Queen''. Chess Endgame Consultants and Publishers, London
* [[John Roycroft]], [[Ken Thompson]] ('''1986'''). ''Queen and Pawn on b7 against Queen''. Chess Endgame Consultants and Publishers, London
* [[Jaap van den Herik]] ('''1986'''). ''Roycroft's 5-Man Chess Endgame Series''. [[ICGA Journal#9_3|ICCA Journal, Vol. 9, No. 3]]
* [[John Roycroft]] ('''1987'''). ''Expert Against Oracle''. [http://www.doc.ic.ac.uk/~shm/MI/mi11.html Machine Intelligence 11]
* [[John Roycroft]] ('''1987'''). ''The Experimental Positions of Ideas in Knowledge Synthesis''. [[ICGA Journal#10_2|ICCA Journal, Vol. 10, No. 2]]
* [[John Roycroft]] ('''1989'''). ''The Computer is at it again - Interfering with the Endgame!'' [https://en.wikipedia.org/wiki/British_Chess_Magazine Britisch Chess Magazine], Vol. 109, No. 10
==1990 ...==
* [[John Roycroft]] ('''1990'''). ''How to Treat Endgame Databases.'' [[ICGA Journal#13_2|ICCA Journal, Vol. 13, No. 2]]
* [[John Roycroft]] ('''1990'''). ''Identifying Three Types of Zugzwang''. [[ICGA Journal#13_4|ICCA Journal, Vol. 13, No. 4]]
* [[John Roycroft]] ('''1991'''). ''A Postscript to the Computer's Involvement''. [https://en.wikipedia.org/wiki/British_Chess_Magazine Britisch Chess Magazine], Vol. 111, No. 2
* [[John Roycroft]] ('''1991'''). ''A Side-Effect of new Database Knowledge''. [[ICGA Journal#14_3|ICCA Journal, Vol. 14, No. 3]]
* [[John Roycroft]] ('''1991'''). ''A Use for Endgame Databases?'' [[ICGA Journal#14_4|ICCA Journal, Vol. 14, No. 4]]
* [[John Roycroft]], [[Don Beal]] ('''1991'''). ''To Make Dumb Endgame Databases Speak''. [[Advances in Computer Chess 6]]
* [[Richard K. Guy]], [[John Roycroft]], [https://plus.google.com/108830667476351401818/about Kenneth Solja] ('''1996'''). ''[http://www.worldcat.org/title/richard-guys-chess-endgame-studies/oclc/037231061 Richard Guy's Chess Endgame Studies]''. Prime Actions

=External Links=
* [https://en.wikipedia.org/wiki/John_Roycroft John Roycroft from Wikipedia]
* [http://www.linkedin.com/pub/john-roycroft/7/636/162 John Roycroft | LinkedIn]
* [http://chesscomposers.blogspot.de/2012/07/july-25th.html Chess Composers | Arthur John Roycroft]
* [http://www.gadycosteff.com/eg/eg.html EG issues 1-152]

=References=
<references />
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[[Category:Chess Composer|Roycroft]]

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