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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.
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Polgar reform chess [multivariant]: In his book Reform-Chess (1997), László Polgár proposed several variants played on board of size 5×8, 6×8, 8×6, or 9×6. [12] The initial piece setup is determined by players in the same way as in Benko's Pre-chess. There are special rules for castling depending on the board. Polgár recommended these ...
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 ...
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 ...
Four-player chess (also known as four-handed chess) is a family of chess variants played with four people. The game features a special board typically made of a standard 8×8 square, with 3 rows of 8 cells each extending from each side, and requires two sets of differently colored pieces. The rules are similar to, but not the same as, regular ...
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