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Nurikabe (puzzle)
Nurikabe (hiragana: ぬりかべ) is a binary determination puzzle named for Nurikabe, an invisible wall in Japanese folklore that blocks roads and delays foot travel. Nurikabe was apparently invented and named by Nikoli; other names (and attempts at localization) for the puzzle include ''Cell Structure'' and ''Islands in the Stream''. Rules The puzzle is played on a typically rectangular grid of cells, some of which contain numbers. Cells are initially of unknown color, but can only be black or white. Two same-color cells are considered "connected" if they are adjacent vertically or horizontally, but not diagonally. Connected white cells form "islands", while connected black cells form the "sea". The challenge is to paint each cell black or white, subject to the following rules: # Each numbered cell is an island cell, the number in it is the number of cells in that island. # Each island must contain exactly one numbered cell. # There must be only one sea, which is not all ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nurikabe Example1
The ''nurikabe'' (塗り壁 or 塗壁) is a ''yōkai'', or spirit, from Japanese folklore. Its name translates to "plaster wall", and it is said to manifest as an invisible wall that impedes or misdirects travelers walking at night. Sometimes referred to in English as "The Wall" or "Mr. Wall", this ''yōkai'' is described as quite tall, to prevent people from climbing over it, and wide enough to dampen any attempts to go around it. Japanese scholar and folklorist Kunio Yanagita recorded perhaps the most prominent early example of ''nurikabe'' and other ''yōkai'' in his books. Manga artist Shigeru Mizuki, Mizuki Shigeru claims to have encountered a ''nurikabe'' in New Guinea, inspiring a ''nurikabe'' character in his manga ''GeGeGe no Kitarō, Gegege no Kitarō.'' Mythology The ''nurikabe'' takes form as a wall—usually invisible—that blocks the path of travelers as they're walking. With the exception of Shigeru Mizuki, Mizuki Shigeru's experience in New Guinea, most legends ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NP-complete
In computational complexity theory, a problem is NP-complete when: # it is a problem for which the correctness of each solution can be verified quickly (namely, in polynomial time) and a brute-force search algorithm can find a solution by trying all possible solutions. # the problem can be used to simulate every other problem for which we can verify quickly that a solution is correct. In this sense, NP-complete problems are the hardest of the problems to which solutions can be verified quickly. If we could find solutions of some NP-complete problem quickly, we could quickly find the solutions of every other problem to which a given solution can be easily verified. The name "NP-complete" is short for "nondeterministic polynomial-time complete". In this name, "nondeterministic" refers to nondeterministic Turing machines, a way of mathematically formalizing the idea of a brute-force search algorithm. Polynomial time refers to an amount of time that is considered "quick" for a de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Nikoli Puzzle Types
is a Japanese publisher that specializes in games and, especially, logic puzzles. ''Nikoli'' is also the nickname of a quarterly magazine (whose full name is ''Puzzle Communication Nikoli'') issued by the company in Tokyo. ''Nikoli'' was established in 1980 and became prominent worldwide with the popularity of ''Sudoku''. The name "Nikoli" comes from the racehorse who won the Irish 2,000 Guineas in 1980; the founder of Nikoli, Maki Kaji, was fond of horseracing and betting. Nikoli's claim to fame is its vast library of "culture independent" puzzles. An example of a language/culture-dependent genre of puzzle would be the crossword, which relies on a specific language and alphabet. For this reason Nikoli's puzzles are often purely logical, and often numerical. Nikoli's Sudoku, the most popular logic problem in Japan, was popularized in the English-speaking world in 2005, though that game has a history stretching back hundreds of years and across the globe. The magazine has invent ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hashiwokakero
''Hashiwokakero'' (橋をかけろ ''Hashi o kakero''; lit. "build bridges!") is a type of logic puzzle published by Nikoli. It has also been published in English under the name ''Bridges'' or ''Chopsticks'' (based on a mistranslation: the ''hashi'' of the title, 橋, means ''bridge''; ''hashi'' written with another character, 箸, means ''chopsticks''). It has also appeared in ''The Times'' under the name ''Hashi''. In France, Denmark, the Netherlands, and Belgium it is published under the name Ai-Ki-Ai. Rules ''Hashiwokakero'' is played on a rectangular grid with no standard size, although the grid itself is not usually drawn. Some cells start out with (usually encircled) numbers from 1 to 8 inclusive; these are the "islands". The rest of the cells are empty. The goal is to connect all of the islands by drawing a series of bridges between the islands. The bridges must follow certain criteria:. * They must begin and end at distinct islands, travelling a straight line ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Minesweeper (computer Game)
A minesweeper is a small warship designed to remove or detonate naval mines. Using various mechanisms intended to counter the threat posed by naval mines, minesweepers keep waterways clear for safe shipping. History The earliest known usage of the naval mine dates to the Ming dynasty.Needham, Volume 5, Part 7, 203–205. Dedicated minesweepers, however, only appeared many centuries later during the Crimean War, where they were deployed by the British. The Crimean War minesweepers were rowboats trailing grapnels to snag mines. Minesweeping technology picked up in the Russo-Japanese War, using aging torpedo boats as minesweepers. In Britain, naval leaders recognized before the outbreak of World War I that the development of sea mines was a threat to the nation's shipping and began efforts to counter the threat. Sir Arthur Wilson noted the real threat of the time was blockade aided by mines and not invasion. The function of the fishing fleet's trawlers with their trawl gear was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atsumari (puzzle)
{{unreferenced, date=May 2019 Atsumari ( ja, 集まり; translates as "collection", "meeting", or "cluster") is a binary-determination puzzle that was originally developed by Quadratic Games for the iPhone platform. The puzzle is played on a hexagonal grid. A rectangular board shape is standard but variations to the board shape can be part of the puzzle design. The puzzle starts with a subset of the hexagonal cells containing a number greater than or equal to zero. The solution to the puzzle is a unique pattern of black/white hexagonal cells that does not violate any of the puzzle rules. Rules * Each cell containing a non-zero number is considered white and must be part of an edge-connected cluster of exactly that many white cells (including the numbered cell). The white clusters are enclosed by black cells or the edge of the board. Thus, a cell containing a '1' must be enclosed by black cells and/or the game board, a cell containing a '2' must have one edge-connected neigh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
LITS
LITS, formerly known as Nuruomino (ヌルオミノ), is a binary determination puzzle published by Nikoli. Rules ''LITS'' is played on a rectangular grid, typically 10×10; the grid is divided into polyominoes, none of which have fewer than four cells. The goal is to shade in a tetromino within each pre-printed polyomino in such a way that no two matching tetrominoes are orthogonally adjacent (with rotations and reflections counting as matching), and that the shaded cells form a valid nurikabe: they are all orthogonally contiguous (form a single polyomino) and contain no 2×2 square tetrominoes as subsets. History The puzzle was first printed in ''Puzzle Communication Nikoli #106''; the original title is a combination of 'nuru' (Japanese: "to paint") and 'omino' (polyomino). In issue #112, the title was changed to the present one, which represents the four (of five) tetrominoes used in the puzzle: the L-shape, the straight, the T-shape, and the skew (square tetrominoes may nev ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hiragana
is a Japanese syllabary, part of the Japanese writing system, along with ''katakana'' as well as ''kanji''. It is a phonetic lettering system. The word ''hiragana'' literally means "flowing" or "simple" kana ("simple" originally as contrasted with kanji). Hiragana and katakana are both kana systems. With few exceptions, each mora in the Japanese language is represented by one character (or one digraph) in each system. This may be either a vowel such as ''"a"'' (hiragana あ); a consonant followed by a vowel such as ''"ka"'' (か); or ''"n"'' (ん), a nasal sonorant which, depending on the context, sounds either like English ''m'', ''n'' or ''ng'' () when syllable-final or like the nasal vowels of French, Portuguese or Polish. Because the characters of the kana do not represent single consonants (except in the case of ん "n"), the kana are referred to as syllabic symbols and not alphabetic letters. Hiragana is used to write ''okurigana'' (kana suffixes following a kanji ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
