Editing Glossary of chess problems (section)

== S ==
{{glossary}}

{{term|term= S |content = S {{anchor|S}} }}
{{defn|defn= In [[algebraic chess notation]], the letter ''N'' is used to indicate the knight. In chess problems, however, the letter ''S'' (representing Springer, German for "knight") is often used instead, while N is reserved for the [[Nightrider (chess)|nightrider]], a popular [[fairy piece]].}}

{{term|term= selfmate |content = [[selfmate]] {{anchor|Selfmate|selfmates}} }}
{{defn|defn= A type of problem where White forces Black to mate them against Black's will within a specified number of moves.}}

{{term|term= seriesmover |content = [[seriesmover]] {{anchor|Seriesmover|seriesmovers}} }}
{{defn|defn= A problem in which one side makes a series of moves without reply.}}

{{term|term= set play |content = set play {{anchor|Set play}} }}
{{defn|defn= Play that is possible from the initial position of a problem if the other player moves first. For example, in a [[#directmate|directmate]], ''set play'' consists of lines of play starting with a Black move (rather than a White move). When set play exists, the [[#key|key]] move may be something that does not change the set play lines, in which case the problem is a complete [[#block|block]], or the lines in the set play may change, in which case the problem is a [[#mutate|mutate]]. Set play is one [[#phase|phase of play]].}}

{{term|term= solus rex |content = solus rex {{anchor|Solus rex|rex solus|Rex solus}} }}
{{defn|defn= Or '''rex solus'''. When either colour (though usually Black) has only their king left.<ref>[http://www.math.harvard.edu/~elkies/FS23j.03/ Freshman Seminar 23j: Chess and Mathematics (Fall 2003)<!-- Bot generated title -->]</ref> The term is derived from Latin and literally means "lone king".<ref>{{Cite web |url=http://beta.uschess.org/frontend/news_7_184.php |title=The United States Chess Federation<!-- Bot generated title --> |access-date=2007-10-07 |archive-url=https://web.archive.org/web/20070914010116/http://beta.uschess.org/frontend/news_7_184.php |archive-date=2007-09-14 |url-status=dead }}</ref>}}

{{term|term= switchback |content = switchback {{anchor|Switchback}} }}
{{defn|defn= A piece leaves a square, and then later in the solution returns to it by the same route (for example, a rook moves e3–e5–e3). Cf. ''[[#round trip|round trip]]'', in which the route taken back to the original square is circuitous.}}

{{glossary end}}