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  2. BATCO - Wikipedia

    en.wikipedia.org/wiki/BATCO

    The spelling box is a 6 column by 5 row matrix labeled horizontally and vertically with single digits. The matrix contains a scrambled alphabet and four blank cells. The authentication table converts a two digit challenge number into a two digit response. It is a 10 by 5 grid, also labeled horizontally and vertically with single digits.

  3. Military Grid Reference System - Wikipedia

    en.wikipedia.org/wiki/Military_Grid_Reference_System

    The intersection of a UTM zone and a latitude band is (normally) a 6° × 8° polygon called a grid zone, whose designation in MGRS is formed by the zone number (one or two digits – the number for zones 1 to 9 is just a single digit, according to the example in DMA TM 8358.1, Section 3-2, [1] Figure 7), followed by the latitude band letter ...

  4. Futoshiki - Wikipedia

    en.wikipedia.org/wiki/Futoshiki

    The puzzle is played on a square grid. The objective is to place the numbers such that each row and column contains only one of each digit. Some digits may be given at the start. Inequality constraints are initially specified between some of the squares, such that one must be higher or lower than its neighbor.

  5. Alphanumeric grid - Wikipedia

    en.wikipedia.org/wiki/Alphanumeric_grid

    An alphanumeric grid (also known as atlas grid [1]) is a simple coordinate system on a grid in which each cell is identified by a combination of a letter and a number. [2]An advantage over numeric coordinates such as easting and northing, which use two numbers instead of a number and a letter to refer to a grid cell, is that there can be no confusion over which coordinate refers to which ...

  6. Glossary of Sudoku - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_Sudoku

    The regions are polyominos made of the same number of squares that are in any one row of the puzzle. The irregularity of the regions compensates for the relatively small number of givens. 4×4 – Shi Doku. [4] Four 2×2 regions. Shi is Japanese for 4. 5×5 – Go Doku [4] and Logi-5. A 5×5 grid with pentomino regions. Go is Japanese for 5.

  7. Geohash - Wikipedia

    en.wikipedia.org/wiki/Geohash

    The curve of the grid of 32 cells was obtained merging 2 by 2 cells of the "next level" (64 cells grid illustrated here) to obtain a geometrical representation of the "odd-digit Geohash". It is possible to build the "И-order curve" from the Z-order curve by merging neighboring cells and indexing the resulting rectangular grid by the function j ...

  8. Battleship (puzzle) - Wikipedia

    en.wikipedia.org/wiki/Battleship_(puzzle)

    A grid may start with clues in the form of squares that have already been solved, showing a submarine, an end piece of a ship, a middle piece of a ship, or water. Each row and column also has a number beside it, indicating the number of squares occupied by ship parts in that row or column, respectively. [5] Variants of the standard form of ...

  9. 24 (puzzle) - Wikipedia

    en.wikipedia.org/wiki/24_(puzzle)

    The original version of 24 is played with an ordinary deck of playing cards with all the face cards removed. The aces are taken to have the value 1 and the basic game proceeds by having 4 cards dealt and the first player that can achieve the number 24 exactly using only allowed operations (addition, subtraction, multiplication, division, and parentheses) wins the hand.