Modern control systems bishop

A bishop is an ordained member of the clergy who is entrusted with a position of authority and oversight in a religious institution.

The London System is an glossary-link style=color:inherit>opening system in chess where White opens with 1.d4 and develops the glossary-link style=color:inherit>dark-squared bishop to f4, then supports the d4-pawn with pawns on e3 and c3.
The other bishop is developed to d3 and the knights typically to f3 and d2.
This set-up often results in a glossary-link style=color:inherit>closed game.
The London System can be used against virtually any Black defence and thus comprises a smaller body of opening theory than many other openings.
Although it has a reputation as a glossary-link style=color:inherit>solid opening, the London System has faced criticism for its tedious nature and lack of glossary-link style=color:inherit>dynamic play.

The Modern Benoni is a chess opening that begins with the moves 1.extiw>d4 extiw>Nf6 2.extiw>c4 extiw>c5 3.extiw>d5 extiw>e6.
It is classified under the ECO codes A60–A79.
After the initial moves, Black proceeds to capture on d5, creating a majority of black pawns on the queenside.
To support their advance, the king's bishop is usually fianchettoed on g7.
These two features differentiate Black's setup from the other Benoni defences and the King's Indian Defence, although transpositions between these openings are common.

A prince-bishop is a bishop who is also the civil ruler of some secular principality and sovereignty, as opposed to Prince of the Church itself, a title associated with cardinals.
Since 1951, the sole extant prince-bishop has been the Bishop of Urgell, Catalonia, who has remained ex officio one of two co-princes of Andorra, along with the French president.