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2. Free Online Puzzle Games - No Downloads - AOL.com

   www.aol.com/games/puzzle

   Play free online Puzzle games and chat with others in real-time and with NO downloads and NOTHING to install.

3. Free Online Games: Play board games, card games, casino games ...

   www.aol.com/games

   Discover the best free online games at AOL.com - Play board, card, casino, puzzle and many more online games while chatting with others in real-time.

4. Play Simply Jigsaw Online for Free - AOL.com

   www.aol.com/games/play/masque-publishing/simply...

   Piece together a new jigsaw puzzle every day, complete with themes that follow the seasons and a super useful edges-only tool. By Masque Publishing. Advertisement. Advertisement. all. board.

5. Sudoku - Wikipedia

   en.wikipedia.org/wiki/Sudoku

   French newspapers featured similar puzzles in the 19th century, and the modern form of the puzzle first appeared in 1979 puzzle books by Dell Magazines under the name Number Place. [5] However, the puzzle type only began to gain widespread popularity in 1986 when it was published by the Japanese puzzle company Nikoli under the name Sudoku ...

6. 10 of the best free online puzzles to enjoy at home - AOL

   www.aol.com/news/10-best-free-online-puzzles...

   We’ve rounded up some of our favourite free online puzzles for you to keep busy. 1. Web Sudoko. A classic for a reason. Photo credit: franckreporter - Getty Images.

7. 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.

8. Killer sudoku - Wikipedia

   en.wikipedia.org/wiki/Killer_Sudoku

   Killer sudoku (also killer su doku, sumdoku, sum doku, sumoku, addoku, or samunanpure サムナンプレ sum-num(ber) pla(ce)) is a puzzle that combines elements of sudoku and kakuro. Despite the name, the simpler killer sudokus can be easier to solve than regular sudokus, depending on the solver's skill at mental arithmetic ; the hardest ones ...

9. Game of the Day: Jigsaw Puzzles - AOL

   www.aol.com/news/2015-01-04-game-of-the-day...

   It's time to test your memory skills with Games.com's Jigsaw Puzzles. Choose from nearly 1,000 images, six different categories, seven types of puzzle pieces, and five different difficulty levels.