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  2. Corresponding squares - Wikipedia

    en.wikipedia.org/wiki/Corresponding_squares

    In chess, two squares are corresponding squares (also known as relative squares, sister squares, or coordinate squares [1]) if the occupation of one of these squares by a king requires the enemy king to move to the other square in order to hold the position. Corresponding squares exist in some chess endgames, usually ones that are mostly ...

  3. MacMahon Squares - Wikipedia

    en.wikipedia.org/wiki/MacMahon_Squares

    The MacMahon Squares game is an example of an edge-matching puzzle. The family of such problems is NP-complete . The first part of New Mathematical Diversions describes these games in general, starting with linear forms ( dominoes ), then progressing in detail with similar games using tiles shaped as equilateral triangles, squares, right ...

  4. Edge-matching puzzle - Wikipedia

    en.wikipedia.org/wiki/Edge-matching_puzzle

    TetraVex is a computer game that presents the player with a square grid and a collection of tiles, by default nine square tiles for a 3×3 grid. Each tile has four single-digit numbers, one on each edge. The objective of the game is to place the tiles into the grid in the proper position, completing this puzzle as quickly as possible.

  5. Equable shape - Wikipedia

    en.wikipedia.org/wiki/Equable_shape

    An area cannot be equal to a length except relative to a particular unit of measurement. For example, if shape has an area of 5 square yards and a perimeter of 5 yards, then it has an area of 45 square feet (4.2 m 2) and a perimeter of 15 feet (since 3 feet = 1 yard and hence 9 square feet = 1 square yard). Moreover, contrary to what the name ...

  6. Mathematical chess problem - Wikipedia

    en.wikipedia.org/wiki/Mathematical_chess_problem

    A mathematical chess problem is a mathematical problem which is formulated using a chessboard and chess pieces. These problems belong to recreational mathematics.The most well-known problems of this kind are the eight queens puzzle and the knight's tour problem, which have connection to graph theory and combinatorics.

  7. Glossary of chess - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_chess

    To reach a position where the players have equal chances of winning, referred to as equality, or a position that is equal. In the opening, because White has the advantage of the first move, the immediate goal for Black is to achieve equality. [151] escape square See flight square. evaluation Or simply eval. The analysis of a position.

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