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  2. Matchbox Educable Noughts and Crosses Engine - Wikipedia

    en.wikipedia.org/wiki/Matchbox_Educable_Noughts...

    This chart had drawings of tic-tac-toe game grids with various configurations of X, O, and empty squares, [4] corresponding to all possible permutations a game could go through as it progressed. [11] After removing duplicate arrangements (ones that were simply rotations or mirror images of other configurations), MENACE used 304 permutations in ...

  3. Tic-tac-toe - Wikipedia

    en.wikipedia.org/wiki/Tic-tac-toe

    Tic-tac-toe (American English), noughts and crosses (Commonwealth English), or Xs and Os (Canadian or Irish English) is a paper-and-pencil game for two players who take turns marking the spaces in a three-by-three grid with X or O. The player who succeeds in placing three of their marks in a horizontal, vertical, or diagonal row first is the ...

  4. Solved game - Wikipedia

    en.wikipedia.org/wiki/Solved_game

    As a simple example of a strong solution, the game of tic-tac-toe is easily solvable as a draw for both players with perfect play (a result manually determinable). Games like nim also admit a rigorous analysis using combinatorial game theory. Whether a game is solved is not necessarily the same as whether it remains interesting for humans to play.

  5. Tic-tac-toe variants - Wikipedia

    en.wikipedia.org/wiki/Tic-tac-toe_variants

    Tic-tac-toe is an instance of an m,n,k-game, where two players alternate taking turns on an m×n board until one of them gets k in a row. [1] Harary's generalized tic-tac-toe is an even broader generalization.

  6. Pigpen cipher - Wikipedia

    en.wikipedia.org/wiki/Pigpen_cipher

    The pigpen cipher uses graphical symbols assigned according to a key similar to the above diagram. [1]The pigpen cipher (alternatively referred to as the masonic cipher, Freemason's cipher, Rosicrucian cipher, Napoleon cipher, and tic-tac-toe cipher) [2] [3] is a geometric simple substitution cipher, which exchanges letters for symbols which are fragments of a grid.

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  8. Ultimate tic-tac-toe - Wikipedia

    en.wikipedia.org/wiki/Ultimate_tic-tac-toe

    Ultimate tic-tac-toe (also known as UTT, super tic-tac-toe, meta tic-tac-toe, (tic-tac-toe)² or Ultimate Noughts and Crosses [1]) is a board game composed of nine tic-tac-toe boards arranged in a 3 × 3 grid. [2] [3] Players take turns playing on the smaller tic-tac-toe boards until one of them wins on the larger board. Compared to traditional ...

  9. Book excerpt: "Source Code: My Beginnings" by Bill Gates - AOL

    www.aol.com/book-excerpt-source-code-beginnings...

    A game of tic-tac-toe is so simple, even kids learn it quickly. But it felt like a triumph to get a machine to do it. ... NTSB officials give an update on the deadly D.C. plane and Black Hawk ...