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  2. Sudoku - Wikipedia

    en.wikipedia.org/wiki/Sudoku

    The general problem of solving Sudoku puzzles on n 2 ×n 2 grids of n×n blocks is known to be NP-complete. [26] Many Sudoku solving algorithms , such as brute force -backtracking and dancing links can solve most 9×9 puzzles efficiently, but combinatorial explosion occurs as n increases, creating practical limits to the properties of Sudokus ...

  3. 3 in Three - Wikipedia

    en.wikipedia.org/wiki/3_in_Three

    Mesh puzzles - the 3 must change a mesh (of sizes ranging from 3x3 to 9x9) to match a given pattern. Missing vowels - the 3 must add missing vowels to common proverbs or homophones . Trapdoor puzzles - the 3 must open or close all of a set of doors; clicking on one door will toggle the open state of several others, with the exact set of doors ...

  4. Minichess - Wikipedia

    en.wikipedia.org/wiki/Minichess

    The game of Tic Tac Chec, played on a 4x4 board. Minichess is a family of chess variants played with regular chess pieces and standard rules, but on a smaller board. [1] The motivation for these variants is to make the game simpler and shorter than standard chess.

  5. Mathematics of Sudoku - Wikipedia

    en.wikipedia.org/wiki/Mathematics_of_Sudoku

    The general problem of solving Sudoku puzzles on n 2 ×n 2 grids of n×n blocks is known to be NP-complete. [8] A puzzle can be expressed as a graph coloring problem. [9] The aim is to construct a 9-coloring of a particular graph, given a partial 9-coloring. The Sudoku graph has 81 vertices, one vertex for each cell.

  6. List of chess variants - Wikipedia

    en.wikipedia.org/wiki/List_of_chess_variants

    1.2.2 Variants with popular fairy pieces: ... A game designed in 2002 to be easy for people to understand but ... Oxford University Press. ISBN 978-0-19-827403-2 ...

  7. Five tips for an easy Christmas dinner, from Temp-tations ...

    www.aol.com/lifestyle/five-tips-for-an-easy...

    Tip 2: Lean into one-dish meals. Not excited about making 10 different sides? Embrace the one-dish life — it’ll make cooking, cleaning, and serving much easier.