Editing Glossary of chess problems (section)

== R ==
{{glossary}}

{{term|term= reflexmate |content = reflexmate {{anchor|Reflexmate|reflexmates}} }}
{{defn|defn= A [[#selfmate|selfmate]] in which both sides must deliver checkmate if they are able to do when it is their move. A problem where this stipulation applies only to Black is a ''semi-reflexmate''.}}

{{term|term= retrograde analysis |content = [[retrograde analysis]] {{anchor|Retrograde analysis|retroanalysis}} }}
{{defn|defn= Or '''retroanalysis'''. Deduction of the move or moves leading up to a given position. A problem may be completely made up of retrograde analysis (as in a [[#proof game|proof game]], or a problem in which the task is to determine Black's last move, for example), or it may be a part of some larger problem (for example, it may be necessary to determine that Black has moved their king leading up to a given position, meaning they are unable to castle, and thus rendering correct a solution that otherwise would be incorrect).}}

{{term|term= round trip |content = round trip {{anchor|Round trip|round trips}} }}
{{defn|defn= A piece leaves a square, and then later in the solution returns to it by a circuitous route (for example, a rook moves e3–g3–g5–e5–e3). Cf. ''[[#switchback|switchback]]'', in which the route taken to the original square is direct.}}

{{term|term= royal piece |content = royal piece {{anchor|Royal piece|royal pieces}} }}
{{defn|defn= In the context of chess variants, a piece subject to [[Check (chess)|check]] and [[checkmate]], as the king is in orthodox chess.<ref>Hooper & Whyld (1996), p. 346. ''royal piece''.</ref> Any piece can be royal; a royal piece moves according to its piece type.<ref>Dickins (1971), p. 50.</ref> Variants in which kings are not royal may allow [[promotion (chess)|promotion]] to a king and disallow [[castling]].}} 

{{glossary end}}