Editing Glossary of chess problems (section)

== I ==
{{glossary}}

{{term|term= ideal mate |content = [[ideal mate]] {{anchor|Ideal mate|ideal mates}} }}
{{defn|defn= A [[#pure mate|pure mate]] in which all units of both colours take part in the mate.}}

{{term|term= illegal position |content = illegal position {{anchor|Illegal position|illegal positions}} }}
{{defn|defn= A position that is impossible to reach in a game by any sequence of legal moves.}}

{{term|term= interference |content = [[Interference (chess)|interference]] {{anchor|Interference|interferences}} }}
{{defn|defn= The closure of the line of one piece by a second piece, thus limiting its movement and cutting it off from certain squares. Various names are given to particular types of interference, among them ''[[#Grimshaw|Grimshaw]]'', ''[[#Novotny|Novotny]]'', ''[[#Anti-Bristol|anti-Bristol]]'', ''[[#Holzhausen|Holzhausen]]'', ''[[#Würzburg–Plachutta|Würzburg–Plachutta]]'' and ''[[#Plachutta|Plachutta]]''.}}

{{glossary end}}