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Check (also checker, Brit: chequer, or dicing) is a pattern of modified stripes consisting of crossed horizontal and vertical lines which form squares.The pattern typically contains two colours where a single checker (that is a single square within the check pattern) is surrounded on all four sides by a checker of a different colour.
Most commonly, it consists of 64 squares (8×8) of alternating dark and light color, typically green and buff (official tournaments), black and red (consumer commercial), or black and white (printed diagrams). An 8×8 checkerboard is used to play many other games, including chess, whereby it is known as a chessboard. Other rectangular square ...
Checkers is played by two opponents on opposite sides of the game board. One player has dark pieces (usually black); the other has light pieces (usually white or red). The darker color moves first, then players alternate turns. A player cannot move the opponent's pieces. A move consists of moving a piece forward to an adjacent unoccupied square.
An illusion closely related to the checker shadow illusion, which also relies on using implied visual shadows to seemingly darken a brighter region to the same color as a well-lit dark region, involves two squares placed at an angle, with the darker square being lit and the lighter square at an angle which receives poor light. [2]
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The puzzle is impossible to complete. A domino placed on the chessboard will always cover one white square and one black square. Therefore, any collection of dominoes placed on the board will cover equal numbers of squares of each color. But any two opposite squares have the same color: both black or both white.
Checkerboard pattern alongside the Priest River in northern Idaho. Checkerboarding can create problems for access and ecological management. It is one of the major causes of inholdings within the boundaries of national forests. As is the case in northwestern California, checkerboarding has resulted in issues with managing national forest land. [5]