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Glossary of chess problems
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== C == {{glossary}} {{term|term= clearance |content = clearance {{anchor|Clearance|clearances}} }} {{defn|defn= In general, the movement of one piece so that another can move to a particular square. In ''square vacation'', the first piece moves so that the second can occupy the square where it stood. In ''line vacation'', the first piece moves so that the second can pass over the square on which it stood on the way to its destination; ''line clearance'', also known as the ''Bristol'', is a particular type of line vacation in which a piece moves along a line so that another piece can move a shorter distance behind it along the same line.}} {{term|term= composition |content = composition {{anchor|Composition|compositions}} }} {{defn|defn= A constructed position (as opposed to a position found in a game) serving as a [[chess problem]] or [[chess puzzle]].}} {{term|term= cook |content = cook {{anchor|Cook|cooks}} }} {{defn|defn= A second [[#key|key]] move, unintended by the composer. A cook is a serious flaw, and invalidates a problem. The publication of cooked problems was once common, but in the modern era computers can be used to check for cooks, and cooked problems are rarely published.}} {{term|term= cylindrical board |content = cylindrical board {{anchor|Cylindrical board|cylindrical boards}} }} {{defn|defn= A board in which a- and h-files are considered connected (a "vertical cylinder"), or the first and eighth ranks are connected (a "horizontal cylinder"). A combination of the vertical and horizontal cylinders (a [[torus|toroidal]] board) is called an ''anchor ring''.}} {{glossary end}}
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