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In mathematics, a queen's graph is an undirected graph that represents all legal moves of the queen—a chess piece—on a chessboard.In the graph, each vertex represents a square on a chessboard, and each edge is a legal move the queen can make, that is, a horizontal, vertical or diagonal move by any number of squares.
The queen (♕, ♛) is the most powerful piece in the game of chess. It can move any number of squares vertically, horizontally or diagonally, combining the powers of the rook and bishop. Each player starts the game with one queen, placed in the middle of the first rank next to the king.
Staunton style chess pieces. Left to right: king, rook, queen, pawn, knight, bishop. The rules of chess (also known as the laws of chess) govern the play of the game of chess. Chess is a two-player abstract strategy board game. Each player controls sixteen pieces of six types on a chessboard. Each type of piece moves in a distinct way.
Simply 1–0 or 0–1 is written whether a player resigned, lost due to time control or forfeited; in the case of a draw simply ½–½ is written whether the draw was decided by mutual agreement, repetition, stalemate, 50-move rule or dead position. Sometimes direct information is given by words such as "resigns", "draw agreed" etc, but this ...
For each position, the tablebase evaluates the situation separately for White-to-move and Black-to-move. Assuming that White has the queen, almost all the positions are White wins, with checkmate forced in no more than ten moves. Some positions are draws because of stalemate or the unavoidable loss of the queen.
q1 = q2*6 + r2. r2 gives the queen's position, so put it on the board. q2 gives the N5N code, so put the knights on the board (of course skipping over the bishops and queen). Starting with idn = 518, we get 518 = 32*16 + 6, and 32 = 5*6 + 2 so the bishop's code is 6, the queen's position is 2 and the N5N code is 5 with configuration -N-N-.
The Queen's Gambit is the chess opening that starts with the moves: [1]. 1. d4 d5 2. c4. It is one of the oldest openings and is still commonly played today. It is traditionally described as a gambit because White appears to sacrifice the c-pawn; however, this could be considered a misnomer as Black cannot retain the pawn without incurring a disadvantage.
The only move that maintains the current evaluation of the position: If the position is theoretically drawn, this is the only move that does not lose; if the position is theoretically won, this is the only move that secures the win. An "!"