Welcome to Master's Logic

This is the classic Master's Logic (also known as Master Mind) game, where you guess the hidden pattern of four colored pegs. If you have never played Master's Logic before, start with this game after reading the rules below.


The markers disappear after a few seconds in the difficult game. You have to be very fast to memorize the colors and numbers of the signals, so you can solve the puzzle.

Simple yet challenging, Master's Logic is a great game for two. The game is known for the small colored pegs and the white/red (in some cases black) markers. The essence of Master's Logic is that the codemaker picks and sets up four different colored pegs in a hidden pattern, then the codebreaker tries to solve it.

At MastersLogic.com the codemaker is the computer, and you have to solve the puzzle. Let's look at the sequence of a game: when the game is launched the computer hides four colors - marked with question marks -, and you have to guess the first line by picking four of the six available different colors. It doesn't matter what you guess on the first line, as no information is provided yet about the solution. Once you click the 'GO!' button, the four colors of your first guess are evaluated by the computer. The result is marked on the small grid on the right. A white marker (rectangle) means that one of the colors you picked is included in the puzzle, but the location is incorrect. The black rectangle means that the color and the location for one of the pegs is correct. If the marker has no color it means that one of the colors was not included in the puzzle. The game's difficulty lies in the fact that the location of the markers on the evaluation grid is not in connection with the location of the colors in the hidden pattern. For example, the top left marker does not necessarily mark the first position on your actual line. The solution will get clearer as more and more information is provided after each guess.

Let's see an example with the solution revealed! The computer gives the following puzzle (signaled by question marks in a real game):


This is our first line:

The evaluation is two white and two empty squares. The two empty squares mean that the puzzle contains the blue and the green pegs, but the location was missed for both. Now we have to change two colors, and the other two colors - in a real game we would not know which two - have to be placed in other locations:

A black marker appears too, since now the green peg is in the right spot. We get two white squares as well, because the red and the yellow are included in the pattern but in other spots. All we need is some more guesses (lines). Each time enough information is given to get us closer to the solution of the puzzle. Once we correctly guess both the color and the location of all the pegs, the computer evaluates it with four black squares. Now a new game can be launched. The results of the matches are stored for registered users. It is important for registered users to know that each game you launch will count toward your statistics - even if you close the game or reload the page.

Registration is recommended to get lots of interesting statistics about your games. The more you play, the higher rank you will achieve! Good luck and have fun!

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