DIAMOND VS LIUBO

Diamond is a two-player abstract strategy board game invented by Larry Back. The invention was inspired by the game Kensington, which uses a similar board pattern and game objective. Rules for Diamond were conceived in 1985 and finalized in 1994. Diamond introduces a new board geometry and neutral pieces, with the aim of enhancing the game dynamic and lowering the potential for draws. Diamond was featured in the February 2013 issue of Games magazine. The Diamond gameboard consists of interlocking squares and triangles. White and Black each control 12 game pieces of their own color. Neutral pieces (red-colored in the diagrams) enter the game via captures. The pieces are played on the line intersections (called points, as in Go). White and black (but not red) pieces can move along straight lines to adjacent unoccupied points. A player wins by being the first to occupy all four corners (points) of a board square with their pieces. Capturing moves are possible in the Movement phase. If the points of a triangle contain exactly one white and one black piece, either player can capture the opponent piece by occupying the remaining open point ("cornering" the enemy piece on the triangle). The captured piece can be cornered on one triangle (see Example 1), or simultaneously cornered on two different triangles (Example 4). The captured piece is immediately removed from the game and replaced on its point by a neutral piece. If a move simultaneously corners two opponent pieces on two different triangles, then neither enemy piece is captured (Examples 2 and 3). A piece can move safely to a triangle point even if the other two points of the triangle are occupied by enemy pieces (Example 5).

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Liubo (Chinese: 六博 or 陸博; pinyin: liù bó; Wade–Giles: liu po; lit. 'six sticks') is an ancient Chinese board game played by two players. For the rules, it is believed that each player had six game pieces that were moved around the points of a square game board that had a distinctive, symmetrical pattern. Moves were determined by the throw of six sticks, which performed the same function as dice in other race games. The game was invented no later than the middle of the 1st millennium BCE, and was popular during the Han dynasty (202 BCE – 220 CE). However, after the Han Dynasty it rapidly declined in popularity, possibly due to the rise in popularity of the game of Go, and it became totally forgotten. Knowledge of the game has increased in recent years with archeological discoveries of Liubo game boards and game equipment in ancient tombs, as well as discoveries of Han dynasty picture stones and picture bricks depicting Liubo players. It is not known when the game of Liubo originated, although according to legend it was invented by Wu Cao (烏曹, called Wu Zhou 烏胄 in the early 2nd century CE Shuowen Jiezi dictionary), a minister to King Jie, the last king of the Xia dynasty, who according to traditional chronology reigned 1728–1675 BCE. While there is no archeological or reliable documentary evidence to support the view that Liubo dates back to the Shang dynasty (1600–1046 BCE), early Chinese records do indicate that Liubo was already a popular game by the Warring States period (476–221 BCE). For example, the Records of the Grand Historian records a speech made during the reign of King Xuan of Qi (reigned 319–301 BCE) that claims that the capital city of Linzi was so wealthy that its citizens were all able to indulge in activities such as playing musical instruments, cockfighting, dog racing, playing Liubo and playing kick ball.

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