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The "nine dots" puzzle. The puzzle asks to link all nine dots using four straight lines or fewer, without lifting the pen. The nine dots puzzle is a mathematical puzzle whose task is to connect nine squarely arranged points with a pen by four (or fewer) straight lines without lifting the pen or retracing any lines.
Engineering paper, or an engineer's pad, [6] is traditionally printed on light green or tan translucent paper. It may have four, five or ten squares per inch. The grid lines are printed on the back side of each page and show through faintly to the front side. Each page has an unprinted margin.
Dots and boxes is a pencil-and-paper game for two players (sometimes more). It was first published in the 19th century by French mathematician Édouard Lucas, who called it la pipopipette. [1] It has gone by many other names, [2] including dots and dashes, game of dots, [3] dot to dot grid, [4] boxes, [5] and pigs in a pen. [6]
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Animation of the missing square puzzle, showing the two arrangements of the pieces and the "missing" square Both "total triangles" are in a perfect 13×5 grid; and both the "component triangles", the blue in a 5×2 grid and the red in an 8×3 grid. The missing square puzzle is an optical illusion used in mathematics classes to help students ...
The only difference between Arukone and Nanbarinku is that in Arukone the clues are letter pairs (as in Dudeney's puzzle), while in Nanbarinku the clues are number pairs. As of 2006 [update] , three books consisting entirely of Numberlink puzzles have been published by Nikoli.
Then I enjoyed building in two theme answers that span the entire grid with 15 letters. Such long answers make constructing the puzzle a bit more difficult but the visual and literal impact is high.
The gameplay is similar to "Flow Free" except the grid is made of hexagons instead of squares. [6] The third expansion, "Flow Free: Warps", was released on August 8, 2017. [7] This expansion allows pipes to warp from an edge of the map to another edge of the map. The fourth expansion, "Flow Free: Shapes", was released on December 18, 2024. [8]