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A 1×3 room containing a '2' must have the two end cells painted, as a painted centre cell would force a breach of rule 1. More generally, a 1×(2n−1) room containing an n must have every other cell within it painted. A 3×3 room containing a '5' must have a checkered pattern, with painted cells in all corners and the center.
Takuzu, also known as Binairo, is a logic puzzle involving placement of two symbols, often 1s and 0s, on a rectangular grid. The objective is to fill the grid with 1s and 0s, where there is an equal number of 1s and 0s in each row and column and no more than two of either number adjacent to each other.
The following other wikis use this file: Usage on en.wikibooks.org Wikijunior:Maze and Drawing Book; Wikijunior:Maze and Drawing Book/Print version; Wikijunior:Maze and Drawing Book/Shape sudoku; Usage on shn.wikibooks.org Wikijunior:လွၵ်းတႃၶေ လႄႈ ပပ်ႉၸၼ်ႁၢင်ႈ
In 1897, a slightly different form of the puzzle was printed in the Brooklyn Daily Eagle, in a column by Sam Loyd. [2] Another early, printed version of Number Link can be found in Henry Ernest Dudeney's book Amusements in mathematics (1917) as a puzzle for motorists (puzzle no. 252). [3]
Fillomino is played on a rectangular grid with no standard size; the internal grid lines are often dotted. (When published as Allied Occupation in the World Puzzle Championship, the cells of the grid are circular, but this is purely an aesthetic concern.) Some cells of the grid start containing numbers, referred to as "givens".
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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. Additionally, it is forbidden for the diagonal lines to form an enclosed loop. Unlike many of Nikoli's similar puzzles, such as Hashiwokakero, a single network of lines is not required.
USA TODAY’s Daily Crossword Puzzles Sudoku & Crossword Puzzle Answers This article originally appeared on USA TODAY: Crossword Blog & Answers for January 9, 2025 by Sally Hoelscher