# Questions tagged [mastermind]

This tag is for questions about the board game Mastermind.

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### Clever ways to solve Mastermind?

Is there any specific way to solve Mastermind? Apart from the first step that is pure chance, is there any way to continue based on the colors that you think are correct?
1k views

### Cryptic Mastermind

And now for something completely different: Cryptic Mastermind! Given below are five sets of five cryptic clues each, all resulting in five-letter words. The black and white pegs, like in regular ...
1k views

### Single Colour Mastermind Problem

Imagine we're playing a game of mastermind with the usual eight colours, only this version has six holes across in which to place colours. And to make it easier for you I tell you that I have filled ...
3k views

### Guess five binary digits!

Person A thinks of a 5 digit binary number. Person B tries to guess the number. B can guess a 5 digit binary number and A will respond with the number of correct digits (digits in the right place). ...
2k views

### Finish the Mastermind

Mastermind is a well-known game. Here's a brief reminder of the rules: There's a secret code consisting of a sequence of five colored circles (items). Colors may appear more than once. Your job is ...
2k views

### Bulls without cows: how many steps are needed to solve this?

I'm bad at this sort of minimum-solve problems so I'm asking for you, proud riddle solvers! There's this huge hangar with 72 different airplanes. They come in six different colors Each color has ...
2k views

### crack this code #1965

Using the clues provided, determine the 'password'. 501 — Two correct numbers in wrong places 135 — One correct number in the ...
837 views

### Hacking a Safe Lock after 3 tries

My friend has a safe lock, with a numeric password of 4 digits (varying between 0-9 each). She lost the password and looked for my help. Fortunately, I was able to hack it. I could try some different ...
983 views

### What is the optimal first move in Mastermind?

For a given number of positions/holes and a given number of colors, which initial guess eliminates the most possibilities for the solution at a minimum? For 4 positions, it's AABB. What is it for 5, ...
8k views

### Crack the 5 digits code

I created this "crack the code" puzzle. I hope the members here like it.
758 views

### Mastermind puzzle - 6 rows each with one correct and one misplaced

Here is a relatively easy mastermind puzzle that I came up with a while ago, the aim is to find the hidden code like as if you were playing normally (you should not have to guess, there is more than ...
495 views

### Guess n binary digits

There's a N (1 ≤ N ≤ 1 000; N is pair) digit binary number and you have a maximum of 2050 guesses to find out which is it. With each try, you will know one of the following: You got it right (100%); ...
206 views

### Creatures from the Deep saw the heroes on a bridge

It was dark and cold in the land of Nemeria. A fellowship of heroes traversed a bridge in a straight line, one after another. Below them, only an abyss. They could hear the howling of strange ...
505 views

### Mastermind - all but last attempt

This a variation of the traditional game mastermind. There are 4 pegs and 6 colors of pegs in the code (repeats allowed). All rules are as usual, except for this one: You are not given any hints (...
129 views

### Word Mastermind

I have thought of a 6 letter word: but I'm not going to tell you what it is. Instead you give me 6 letter words, and I mark them according to the normal rules of Mastermind. A 'word' can be garbage ...
369 views

### History of “Bulls and Cows”

Bulls and Cows is a game that predates Mastermind but is closely related. The wikipedia has for first dates of Mastermind as 1970. What is the earliest reference to the game Bulls and Cows?
335 views

### Mastermind with an error

Mastermind is a code-breaking game for two players where people try to guess the opponents guesses. You can find the detail on wikipedia. The game you play with your friend is a little different, a ...
292 views

### Mastermind encryption in least amount of steps possible?

I need to encode HA2QG into a mastermind number list. ex; Solve the code: 318 One number is correct and well placed 271 One number is correct but wrong placed 709 Two numbers ...