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    <p>There is a great site about MasterMind strategy <a href="http://home.pacific.net.hk/~kfzhou/mmh.html#Tutor" rel="nofollow noreferrer">here</a>. The author starts off with very simple MasterMind problems (using numbers rather than letters, and ignoring order and repetition) and gradually builds up to a full MasterMind problem (using colours, which can be repeated, in any order, <em>even</em> with the possibility of errors in the clues).</p> <p>The seven tutorials that are presented are as follows:</p> <ul> <li><a href="http://home.pacific.net.hk/~kfzhou/Mmtutor1e.html" rel="nofollow noreferrer">Tutorial 1 - The simplest game setting (<em>no errors, fixed order, no repetition</em>)</a></li> <li><a href="http://home.pacific.net.hk/~kfzhou/Mmtutor2e.html" rel="nofollow noreferrer">Tutorial 2 - Code may contain blank spaces (<em>no errors, fixed order, no repetition</em>)</a></li> <li><a href="http://home.pacific.net.hk/~kfzhou/Mmtutor3e.html" rel="nofollow noreferrer">Tutorial 3 - Hints may contain errors (<em>fixed order, no repetition</em>)</a></li> <li><a href="http://home.pacific.net.hk/~kfzhou/Mmtutor4e.html" rel="nofollow noreferrer">Tutorial 4 - Game started from the middle (<em>no errors, fixed order, no repetition</em>)</a></li> <li><a href="http://home.pacific.net.hk/~kfzhou/Mmtutor5e.html" rel="nofollow noreferrer">Tutorial 5 - Digits / colours may be repeated (<em>no errors, fixed order, each colour repeated at most 4 times</em>)</a></li> <li><a href="http://home.pacific.net.hk/~kfzhou/Mmtutor6e.html" rel="nofollow noreferrer">Tutorial 6 - Digits / colours arranged in random order (<em>no errors, random order, no repetition</em>)</a></li> <li><a href="http://home.pacific.net.hk/~kfzhou/Mmtutor7e.html" rel="nofollow noreferrer">Tutorial 7 - Putting it all together (<em>no errors, random order, each colour repeated at most 4 times</em>)</a></li> </ul>
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    1. POHow to solve the "Mastermind" guessing game?
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    1. USa_m0d
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    1. CONice links, thanks. Unfortunately, he's built his whole strategy up on the idea that "each [guess] only the least possible modification is made to the previous assumptions". (I used to play that way, too.) One of the things my solver showed me was that you get less information if you stick to old assumptions; better to challenge your assumptions as frequently as possible to squeeze the most information out of each guess.
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    2. COOkay - that's a good point. I have been using his method to solve it methodically, but I will start looking at other ways now as well.
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