Editing Perpetual check (section)

==History==
{{Chess diagram
|tright
|N.N. vs. Unknown, 1750
|rd|  |bd|  |  |  |  |  
|pd|pd|pd|  |  |bl|pd|kd
|  |  |  |pd|  |  |nl|pd
|  |  |  |  |pd|  |  |  
|  |  |  |  |pl|  |  |qd
|  |  |  |pl|  |nd|  |pl
|pl|pl|pl|  |  |bd|pl|  
|rl|  |bl|  |  |  |  |kl
|Final position after 15...Kh7
}}
The ''Oxford Encyclopedia of Chess Games, Volume 1 (1485–1866)'' includes all recorded games played up to 1800.<ref>{{Harvcol|Levy|O'Connell|1981|p=ix}}</ref> The earliest example of perpetual check contained in it is a game played by two unknown players in 1750:

:{{chessgloss|NN|N.N.}} vs. Unknown, 1750 <br />'''1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. 0-0''' (the rules of [[castling]] not yet having been standardized in their current form, White moved his king to h1 and his rook to f1) '''4... Nf6 5. Nc3 Ng4 6. d3 0-0''' (Black moved his king to h8 and his rook to f8) '''7. Ng5 d6 8. h3 h6 9. Nxf7+ Rxf7 10. Bxf7 Qh4 11. Qf3 Nxf2+ 12. Rxf2 Bxf2 13. Nd5 Nd4 14. Ne7 Nxf3 15. Ng6+ Kh7 ½–½''' in light of 16.Nf8+ Kh8 17.Ng6+ etc.<ref>{{Harvcol|Levy|O'Connell|1981|p=9}}</ref>

The next examples of perpetual check in the book are two games, both ending in perpetual check, played in 1788 between Bowdler and [[François-André Danican Philidor|Philidor]], with Philidor giving [[chess handicap|odds]] of [[pawn and move]].<ref>{{Harvcol|Levy|O'Connell|1981|p=12}}</ref>

A draw by perpetual check used to be in the [[rules of chess]].<ref>{{Harvcol|Reinfeld|1954|p=175}}</ref><ref>{{Harvcol|Reinfeld|1958|pp=41–43}}</ref>  [[Howard Staunton]] gave it as one of six ways to draw a game in ''The Chess-Player's Handbook''.<ref>{{Harvcol|Staunton|1847|p=21}}</ref> It has since been removed because perpetual check will eventually allow a draw claim by either [[threefold repetition]] or the [[fifty-move rule]].  If a player demonstrates intent to perform perpetual check, the players usually [[Draw by agreement|agree to a draw]].<ref>{{Harvcol|Hooper|Whyld|1992|}}</ref>
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