Editing Glossary of chess problems (section)

== P ==
{{glossary}}

{{term|term= phase |content = [[Phase of play|phase]] {{anchor|Phase|phase of play|Phase of play|phases}} }}
{{defn|defn= After the [[#key|key]], after [[#try|tries]] and [[#set play|set play]] each constitutes a ''phase of play''. A problem with set play is said to have two phases (the set play being one phase, the [[#post-key play|post-key play]] being another); a problem with three tries would be a four-phase problem (each try being one phase, with the post-key play the fourth). Plays in different phases sometimes relate to each other.}}

{{term|term= Pickaninny |content = [[Pickaninny (chess)|Pickaninny]] {{anchor|Pickaninny}} }}
{{defn|defn= A [[#problem|chess problem]] theme in which, at some point in the solution, a black pawn on its starting square makes each of its four possible moves (forward one square, forward two squares, capture to the left and capture to the right). If the same behaviour is exhibited by a white pawn, it is an ''[[#Albino|Albino]]''. (The [[pickaninny|term]], which derives from an archaic reference to small black children, has a derogatory meaning in modern [[English language|English]].)}}

{{term|term= Plachutta |content = [[Plachutta]] {{anchor|Plachutta}} }}
{{defn|defn= A theme in which a sacrificed white piece can be taken by two similarly moving black pieces, but whichever piece makes the capture, it interferes with the other. Essentially a pair of [[#Holzhausen|Holzhausen]] interferences (or a [[#Würzburg–Plachutta|Würzburg–Plachutta]] interference) brought about by a white sacrifice on the critical square.}}

{{term|term= post-key play |content = post-key play {{anchor|Post-key play}} }}
{{defn|defn= The play following the [[#key|key]], that is, the lines of play that fulfill the stipulation of the problem. This is opposed to [[#set play|set play]] and [[#virtual play|virtual play]] (both of which may also be important elements in the attractiveness of a problem).}}

{{term|term= problem |content = [[Chess problem|problem]] {{anchor|Problem|chess problem|problems}} }}
{{defn|defn= Together with [[chess study]] is part of a chess [[#composition|composition]].}}

{{term|term= proof game |content = [[proof game]] {{anchor|Proof game|proof games}} }}
{{defn|defn= A type of problem in which the job of the solver is to construct a game of a given number of moves in which the final position is the one given by the composer. A kind of [[#retrograde analysis|retrograde analysis]].}}

{{term|term= pure mate |content = [[pure mate]] {{anchor|Pure mate|pure mates}} }}
{{defn|defn= A mating position in which each of the king’s potential moves to an adjacent square is prevented in exactly one way: either occupied by a friendly man or attacked by a single hostile man, but not both (unless such an attacking man is pinning a friendly man to the king to prevent it from interposing to block the check).}}

{{term|term= puzzle |content = [[Chess puzzle|puzzle]] {{anchor|Puzzle|chess puzzle|puzzles}} }}
{{defn|defn= Synonym for ''[[#composition|composition]]''.}}

{{glossary end}}