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2. Fifty-move rule - Wikipedia

   en.wikipedia.org/wiki/Fifty-move_rule

   The relevant part of the FIDE laws of chess is quoted below: [4]. 9.3 The game is drawn, upon a correct claim by a player having the move, if: 9.3.1 he writes his move, which cannot be changed, on his scoresheet and declares to the arbiter his intention to make this move which will result in the last 50 moves by each player having been made without the movement of any pawn and without any ...

3. Rules of chess - Wikipedia

   en.wikipedia.org/wiki/Rules_of_chess

   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.

4. Draw (chess) - Wikipedia

   en.wikipedia.org/wiki/Draw_(chess)

   In chess, there are a number of ways that a game can end in a draw, neither player winning.Draws are codified by various rules of chess including stalemate (when the player to move is not in check but has no legal move), threefold repetition (when the same position occurs three times with the same player to move), and the fifty-move rule (when the last fifty successive moves made by both ...

5. Endgame tablebase - Wikipedia

   en.wikipedia.org/wiki/Endgame_tablebase

   Competitive players must know that some tablebases ignore the fifty-move rule. According to that rule, if fifty moves have passed without a capture or a pawn move, either player may claim a draw. FIDE changed the rules several times, starting in 1974, to allow one hundred moves for endgames where fifty moves were insufficient to win. In 1988 ...

6. Board representation (computer chess) - Wikipedia

   en.wikipedia.org/wiki/Board_representation...

   Board representation in computer chess is a data structure in a chess program representing the position on the chessboard and associated game state. [1] Board representation is fundamental to all aspects of a chess program including move generation, the evaluation function, and making and unmaking moves (i.e. search) as well as maintaining the state of the game during play.

7. Queen versus rook endgame - Wikipedia

   en.wikipedia.org/wiki/Queen_versus_rook_endgame

   Browne could have won the rook or checkmated in 31 moves with perfect play. After 45 moves, Browne realized that he would not be able to win within 50 moves, according to the fifty-move rule. [5] Browne studied the endgame and, later in the month, played another game from a different starting position.