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Sample puzzle Solution to above puzzle. Masyu (ましゅ, Mashu, IPA [maɕu͍];) is a type of logic puzzle designed and published by Nikoli. The purpose of its creation was to present a puzzle that uses no numbers or letters and yet retains depth and aesthetics.
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.
Generally, most American puzzles are 15×15 squares; if another size, they typically have an odd number of rows and columns: e.g., 21×21 for "Sunday-size" puzzles; Games magazine will accept 17×17 puzzles, Simon & Schuster accepts both 17×17 and 19×19 puzzles, and The New York Times requires diagramless puzzles to be 17×17. [90]
The puzzle proved popular, and Sulzberger himself authored a Times puzzle before the year was out. [11] In 1950, the crossword became a daily feature. That first daily puzzle was published without an author line, and as of 2001 the identity of the author of the first weekday Times crossword remained unknown. [13]
Mechanical puzzle. Ball-in-a-maze puzzle; Burr puzzle; Word puzzle. Acrostic; Daughter in the box; Disentanglement puzzle; Edge-matching puzzle; Egg of Columbus; Eight queens puzzle; Einstein's Puzzle; Eternity puzzle; Fifteen puzzle; Fox, goose and bag of beans puzzle; Geomagic square; Globe puzzle; Graeco-Latin square; Gry; Happy Cube ...
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The puzzles are commissioned by Shortz from the top constructors in crosswords, with the fifth puzzle the hardest of the first six. The two three-round sessions consist of puzzles with 15, 17 and 19 squares in each row and column respectively. The Sunday puzzle is appropriately 21 x 21 squares, the size of regulation Sunday puzzles in newspapers.
The term "puzzle" typically refers to problems in recreational mathematics, geometry, and language — often as a means for education, cognitive skills enhancement in symbolic reasoning or logic. See also Category:Problem solving , for problems which are non-recreational or otherwise outside of the "puzzle" definition.