Editing Plachutta (section)

{{Short description|Device found in chess problems}}
The '''Plachutta''' is a device found in [[chess problem]]s wherein a piece is sacrificially positioned in blockade to deny coverage of multiple distant squares required by the opposition. For example, two of an opponent's [[bishop (chess)|bishop]]s, [[queen (chess)|queen]], or [[rook (chess)|rook]]s are defending locations through an intersection square, and an enemy unit moved into that square blocks disrupts coverage in such a way that, even if captured, the previous defensive situation cannot be restored.

The Plachutta is named after [[Joseph Plachutta]] (1827–1883), and related to a number of other problem themes: it can be regarded as a [[Würzburg–Plachutta]] brought about by a sacrifice on the critical square (a Würzburg-Plachutta itself being a pair of [[Holzhausen interference|Holzhausen]] interferences); or it can be thought of as a [[Novotny (chess)|Novotny]] with similarly moving (rather than differently moving) black pieces involved (a Novotny itself being a [[Grimshaw (chess)|Grimshaw]] brought about by a white sacrifice on the critical square). It can also be compared to the [[anti-Bristol]], in which two similarly moving black pieces interfere with each other along the same line.