Editing Janus Chess (section)

==Description==
The usual set of [[chess piece]]s is extended with two [[pawn (chess)|pawn]]s and two januses per player. Each janus is placed between a [[rook (chess)|rook]] and a knight. The relative position of the [[king (chess)|king]] and [[queen (chess)|queen]] is reversed compared to [[chess]]. After [[castling]], the king stands on either the b- or i-file and a rook stands on either the c- or h-file, depending on which side castling is done.

The janus is considered almost as powerful as a queen and is usually valued at about 8 points (based on [[Chess piece relative value|chess piece value]]s with pawns valued at 1). It is the only piece in the game that is able to [[checkmate]] the opponent's king without the assistance of any other piece, with the king in a corner and the janus two squares away on a diagonal, but this checkmate cannot be {{chessgloss|forced mate|forced}}. Due to the extra pieces, each player starts the game with considerably more "{{chessgloss|material}} power" compared to standard chess; however, the game has only a slightly higher material "power density",<ref>vickalan (Jan 22, 2017). "[https://www.chess.com/forum/view/chess960-chess-variants/comparison-of-material-power-in-variant-chess-games Comparison of Material Power in Variant-Chess Games]", ''Chess.com''.</ref> since there is more room for players to maneuver pieces because of the larger board (10×8 = 80 squares). Due to the different board and pieces, players are unable to use normal chess [[Chess opening|opening theory]], and chess [[Endgame tablebase|tablebases]] have limited value in the [[Chess endgame|endgame]].

Janus Chess has been popular in Europe<ref>[https://brainking.com/en/GameRules?tp=40 Game rules (Janus Chess)], ''BrainKing.com''.</ref> with regular tournaments drawing strong players.<ref name=CECV /> Several chess [[Grandmaster (chess)|grandmasters]] have played this game including [[Viktor Korchnoi]], [[Péter Lékó]] and [[Artur Yusupov (chess player)|Artur Yusupov]]. Korchnoi said: "I like playing Janus Chess because one can show more creativity than in normal chess."<ref name=CECV />