Everything as in standard chess, but you see only own pieces and don't know how the opponent moves. On each move you can touch any of your pieces to see all of its possible moves. This gives you some information about the position of opponent pieces. If you are given a check (you may not see this), only moving of the King will be allowed.
 
Kriegspiel is a quite popular chess variant. For more information and links, see web-page on Chessvariants site.
 
When playing this game, please switch off the move list (in 'View' menu). You should also switch off 'Smart moves' ('View'/'Options'/'Board'). In classical Kriegspiel both players don't see enemy pieces, but in this implementation, the computer actually does. This makes a computer very strong opponent. You can select easier variants of game: Black without Queen, Queen and Rook or Queen and two Rooks. Alternatively you can select variant when only King or Queen is invisible.
 
You can get one interesting variation of Kriegspiel, if you switch on option 'Show'/'Attacks' from context menu. Black circles will show positions to where you can move, red one will show position occupied by enemy pieces, which you can capture. For after game replay, press 'Switch Piece Set' button. All pieces in alternative piece set are intentionally visible to let you see what happened in the reality.
 
There 9 variants in zrf file:

• Kriegspiel
• Kriegspiel (Black without Queen)
• Kriegspiel (Black without Queen and Rook)
• Kriegspiel (Black without Queen and two Rooks)
• Invisible King
• Invisible Pair
• Kriegspiel, Mate with a Rook
• Kriegspiel, Mate with two Bishops
• Kriegspiel, Mate with Bishop and Knight