Banqi () or Half Chess, also known as Dark Chess (暗棋) or Blind Chess (盲棋), is a two-player Chinese board game played on a 4×8 grid, or half of the xiangqi (Chinese chess) board. Most games last between ten and twenty minutes, but advanced games can last for an hour or more. Banqi is a social game, usually played for fun rather than serious competition. A more formal version of Banqi may have evolved into the games Jungle and modern Luzhanqi. Equipment Board Although boards made specifically for Banqi exist, it is common to play on one half of the xiangqi board (using only one side of the River). Pieces Banqi uses xiangqi pieces. The backs of the pieces must be indistinguishable from each other so the pieces cannot be identified when face down. Pieces with international symbols printed on their backs are unsuitable. Each player controls five Soldiers, one General, and two each of the five other piece types, for a total of 16 pieces. In a typical set, one player's pieces are red, and the other player's pieces are black. The characters may also differ. For more detailed descriptions of the pieces used in this game, see the xiangqi article. Playing the game The 32 pieces are shuffled and randomly allocated face-down to squares on the board. The pieces, as in Western chess, are placed inside the squares, rather than on the intersections as in Chinese chess. The first player turns up a piece to begin the game. The color of that first uncovered piece is the color he or she will play in the game. The second player then makes a move, and the two alternate until the game is finished. The game ends when a player cannot move, and that player is the loser. Most often, the game is lost because all of a player's pieces have been captured and so he has no pieces to move. However, it is possible for one player to surround all of the other player's remaining pieces in a manner that makes it impossible for them to move. Rules for moves There are three kinds of moves. A player may turn a piece face-up, move a piece, or capture an enemy piece. In some game variants, multiple captures may be made in one turn. Turning over a piece Turning a piece face-up is a legal move if there are any