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The first known publication of chess rules was in a book by Luis Ramírez de Lucena about 1497, shortly after the movement of the queen, bishop, and pawn were changed to their modern form. [111] Ruy López de Segura gave rules of chess in his 1561 book Libro de la invencion liberal y arte del juego del axedrez. [112]
Minichess – board has less squares, e.g. 3×3, 5×5, 5×6, etc. Los Alamos chess – 6×6 variant without bishops. Grid chess – 8×8 board with a 4×4 grid, dividing the board in 16 spaces of 2×2 squares each. Works just like traditional chess, except that a piece must cross at least one grid line at each move.
The chess variants listed below are derived from chess by changing one or more of the many rules of the game. The rules can be grouped into categories, from the most innocuous (starting position) to the most dramatic (adding chance/randomness to the gameplay after the initial piece placement).
The Fischer random chess variant (also known as Chess960) has custom castling rules wherein the king and the rook end up where they would be in a normal chess game even if they start on different squares because of the randomized start positions. It is thus possible for the king or rook to not move while castling, or for the destination square ...
Stage 6 dementia marks a need for caregiver help to perform basic daily activities, such as eating, using the toilet, and other self-care. Seniors experiencing this stage of moderately severe ...
The rule is also known as repetition of position and, in the USCF rules, as triple occurrence of position. [1] Two positions are by definition "the same" if the same types of pieces occupy the same squares, the same player has the move, the remaining castling rights are the same and the possibility to capture en passant is the same.
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For example, on a board made of horizontally aligned hexagons, the forward and backward directions can be referred to as the "12 o'clock" and "6 o'clock" directions. [1] The first applications of chess on hexagonal boards probably occurred mid-19th century, but two early examples did not include checkmate as the winning objective. More chess ...