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A self-reference puzzle is a type of logical puzzle where the question in the puzzle refers to the attributes of the puzzle itself. [1] A common example is that a "fill in the blanks" style sentence is given, but what is filled in the blanks can contribute to the sentence itself.
The logic puzzle was first produced by Charles Lutwidge Dodgson, who is better known under his pen name Lewis Carroll, the author of Alice's Adventures in Wonderland.In his book The Game of Logic he introduced a game to solve problems such as confirming the conclusion "Some greyhounds are not fat" from the statements "No fat creatures run well" and "Some greyhounds run well". [1]
The player has to pair up all the matching numbers on the grid with single continuous lines (or paths). The lines cannot branch off or cross over each other, and the numbers have to fall at the end of each line (i.e., not in the middle).
Shakashaka is played on a rectangular grid of white and black squares. Some black cells may contain a number. The objective of the puzzle is to place triangles in some of the white cells. There are four kinds of triangles which can be put in squares: In the resulting grid,
Gokigen Naname is played on a rectangular grid in which numbers in circles appear at some of the intersections on the grid.. The object is to draw diagonal lines in each cell of the grid, such that the number in each circle equals the number of lines extending from that circle.
Yajilin is played on a rectangular grid of squares. At the beginning, cells are either indicative (containing a number and an arrow pointing "up", "down", "left," or "right") or empty. Black cells, an additional cell type, may be discovered during the solving process.
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Futoshiki (不等式, futōshiki), or More or Less, is a logic puzzle game from Japan. Its name means "inequality". It is also spelled hutosiki (using Kunrei-shiki romanization). Futoshiki was developed by Tamaki Seto in 2001. [1] An example of a 5×5 Futoshiki puzzle ..... and its solution. The puzzle is played on a square grid.