Editing Dark chess (section)

== Rules ==
The goal of this chess variant is not to checkmate the king, but to capture it. A player is not told if their king is in check. Failing to move out of check, or moving into check, are both legal, and can obviously result in a capture and loss of the game.

Each player views a different version of the board, on which they can only see their own pieces, and the squares where these pieces can legally move, as well as any opponent pieces on those squares (which must therefore be capturable). It is indicated to the player which squares are hidden, so a hidden square can never be confused with a visible empty square. As an example, it is always clear when an enemy piece is directly in front of a pawn, because that square will be hidden (as capturing it is not a legal move for the pawn to make).

''[[En passant]]'' capture is allowed; the threatened pawn and the square it moved through are both visible to the capturing player, but only until the end of the turn. Unlike standard chess, [[castling]] is allowed out of check, into check, and through the positions attacked by enemy pieces.

This chess variant is best played on online [[chess servers]]. In September 2020, Dark chess was the most popular variant on [[Chess.com]].<ref>{{Cite web |last=Jason (EnergeticHay) |date=2020-09-27 |title=Fog of War: Chess.com's Most Popular Variant |url=https://www.chess.com/blog/EnergeticHay/fog-of-war-chess-coms-most-popular-variant |access-date=2024-02-08 |website=[[Chess.com]] |language=en-US}}</ref> For playing over-the-board, three chess sets and a referee are needed, just as in [[Kriegspiel (chess)|Kriegspiel]].

There are some minor differences in the rules on different servers:
* SchemingMind: the player does not see what is in front of their pawns, but knows if the position is occupied or not.<ref>{{Cite web |title=SchemingMind.com |url=https://www.schemingmind.com/ |access-date=2024-02-08 |website=SchemingMind.com |language=en-US}}</ref>
* [[Chess.com]] (known as "Fog of War chess"); the player does not see what is in front of their pawns, but knows if the position is occupied or not; pawn promotions remain unknown for the opponent.<ref name=":0">{{cite web|url=https://support.chess.com/article/1668-what-is-fog-of-war-chess|title=What is Fog of War chess?|website=[[Chess.com]]|accessdate=April 8, 2021}}</ref> Before November 5, 2021 when a pawn could be taken en passant, the pawn was not visible, but the en passant square was lit up.