Problem 702. Play Tic Tac Toe : No Losses Allowed

Created by Richard Zapor

Solve Later

{"relationships":[{"relationshipType":"http://schemas.mathworks.com/matlab/code/2013/relationships/document","targetMode":"","relationshipId":"rId1","target":"/matlab/document.xml"},{"relationshipType":"http://schemas.mathworks.com/matlab/code/2013/relationships/output","targetMode":"","relationshipId":"rId2","target":"/matlab/output.xml"}],"parts":[{"partUri":"/matlab/document.xml","relationship":[],"contentType":"application/vnd.mathworks.matlab.code.document+xml","content":"<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<w:document xmlns:w=\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\"><w:body><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>Let's play a friendly game of Tic Tac Toe</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>Create an efficient algorithm to Never Lose.</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>The Player may be either the first or second to play.</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>Initial board is zeros(3). Computer moves are 1s and Player moves are 2s.</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>Player output is an integer 1:9 to identify array index position</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"code\"/></w:pPr><w:r><w:t><![CDATA[ 1 4 7\n 2 5 8\n 3 6 9]]></w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>Example game play:</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"code\"/></w:pPr><w:r><w:t><![CDATA[ Input:        [1 0 0; 0 0 0; 0 0 0]  % Computer playing first in this example\n Output:        5                     % Player return value\n Yields :      [1 0 0; 0 2 0; 0 0 0]  % Computer then picks position 2.\n Second Input: [1 0 0; 1 2 0; 0 0 0]  % Computer's second move shown.]]></w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>Passing score is never losing.</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>The contest engine is almost Random - about 4000 times. (&lt;12% of Time-Out)</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>Creating the perfect tic-tac-toe engine seemed unnecessary.</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>Your Wins/Losses/Draws will be shown.</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>On a loss the losing board will be shown</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>Follow-up game will be WOPR:Global Thermonuclear War.</w:t></w:r></w:p></w:body></w:document>"},{"partUri":"/matlab/output.xml","contentType":"text/xml","content":"<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\" ?><embeddedOutputs><metaData><evaluationState>manual</evaluationState><layoutState>code</layoutState><outputStatus>ready</outputStatus></metaData><outputArray type=\"array\"/><regionArray type=\"array\"/></embeddedOutputs>"}]}

Solve

Solution Stats

69 Solutions
9 Solvers

Last Solution submitted on Dec 13, 2020

Last 200 Solutions

Problem Comments

1 Comment

1 Comment

Richard Zapor on 23 May 2012

Test Suite has been corrected to NOT allow a vector Input to fill ALL with 2s.
Thank You for identifying this and also that invalid input would Win.

Problem Recent Solvers9

Problem Tags

game theory interactive movie classic multi-call tic tac toe

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Problem 702. Play Tic Tac Toe : No Losses Allowed

Solution Stats

Last 200 Solutions

Problem Comments

Problem Recent Solvers9

Suggested Problems

More from this Author247

Problem Tags

Community Treasure Hunt

Problem 702. Play Tic Tac Toe : No Losses Allowed

Solution Stats

Last 200 Solutions

Problem Comments

Problem Recent Solvers9

Suggested Problems

More from this Author247

Problem Tags

Community Treasure Hunt

Players