# Questions tagged [mastermind]

This tag is for questions about the board game Mastermind.

44 questions
Filter by
Sorted by
Tagged with
2k views

### Playing Mastermind against an angel and the devil

This puzzle is based on a card game. There are 7 suspects and 3 of them committed a crime. The game contains 35 cards that contain the 35 possible choices of 3 out of the 7 suspects. One card is drawn ...
• 1,661
855 views

### A Trivial Pursuit #09 (History 2/4): Windows 7

This is part 9 of A Trivial Pursuit, a 25-part puzzle hunt. Each part is solvable on its own, with the exception of the meta-puzzle at the end. Colourblind-friendly version available here. Puzzle in ...
• 133k
272 views

### How to solve large "crack the lock" questions

I already have the solution for this crack the lock puzzle but am stuck on how to get there. The smaller puzzles I've solved use a different style of deductive reasoning. Rules: For this specific ...
• 129
2k views

### Where to start with a large crack the lock puzzle like this?

Below is a puzzle called crack the lock. The rules are simple: the lock contains 16 characters in this particular puzzle No character can be used twice the two numbers on the the far right tell you ...
• 129
329 views

### Finding a 3-digit passcode from 4 mastermind clues

What is the logic used to solve this problem?
308 views

### A different Crack the Code puzzle

This is a different Crack the Code and get the word puzzle. Here, instead of letters, actual words are hidden. The final word is a 7 letter famous person. That word consists of several words. I only ...
• 5,407
2k views

### A famous 6 letter person

Crack the code and name this famous person
• 5,407
329 views

### A safe with 4 locks

You are trying to open a safe. There are 4 locks and 4 keys (red, green, blue and yellow). When you insert the keys into the locks, the safe will make k beeps, where k is the number of keys that are ...
• 33.1k
908 views

### Colorblind Mastermind

This puzzle is part of the Monthly Topic Challenge #7: Board games. Inspired by the incident, I created a variant of Mastermind, although it wasn't actually intended for colorblind people. The main ...
• 2,699
1 vote
216 views

### Mastermind algorithm but for unique colors only

I have seen Donald Knuth's Algorithm to guess the correct pattern in maximum 5 tries. However, I want to write a program to find the correct pattern effectively however the code maker can only make a ...
2k views

### Mastermind: Win in two

Bob was very lucky in his last game of Mastermind. Alice was the codemaker; Bob was the codebreaker. They played with six colors and a length four code. Bob's first guess wasn't an immediate win. But ...
• 1,475
13k views

### What's the optimal strategy for Wordle?

Wordle is a game by Josh Wardle in which you try to guess a 5-letter word in at most six attempts. After each guess, the letters which are not in the word are highlighted in grey, the letters which ...
207 views

### What sequence of letters am I thinking of? (Or: Introducing "Bulls")

1. Warmup "I'm thinking of three letters," I grinned, "in a particular order, and with no repeats." "Are they DRL?" "Well, you guessed one correctly." "Are ...
• 711
1k views

### What five letters am I thinking of? (Simplified Jotto.)

1. Warmup "I'm thinking of five letters," I smiled. "Are they ... G, B, K, J, and N?" you asked. "No, none of those." "C, X, Q, A, and N?" I gulped. "Four ...
• 711
321 views

### Mastermind: What should I guess next? That depends

Bob was playing a popular adventure game on his computer, and he came across a Mastermind minigame. Here's the results of his first four guesses: Bob has never been great at solving logic puzzles on ...
820 views

### Two dimensional Mastermind

You have probably played the classic game of Mastermind with 4 pegs and 6 colours. It turns out that the codebreaker can always find the pattern in 5 moves or fewer. Now consider the 2D version of the ...
• 33.1k
2k views

### Mastermind puzzle: 3548 has 2 correct, one in right place [closed]

Hints: 3548 - 2 correct digits, but only 1 in the right place 4860 - 1 correct digit, but in the wrong place 2356 - 3 correct digits, but only 1 in the right place 2584 - 2 correct digits and in their ...
1 vote
240 views

### Decode the Code - Solve it

Everything is contained in the image. For any clarification, comment down below.
449 views

### Master Mind Rule ambiguity

A recent question about Programming a Prolog solver for a Master Mind type problem generated a question about a scoring rule ambiguity for Master Mind, which is not solved by the Wikipedia page entry ...
743 views

### 5-digit puzzle code looking for solution

Can somebody help me solve this, or can you teach me how? 4 7 2 9 1 - One number is correct but not in right position 9 4 6 8 7 - One number is correct but not in right position 3 1 8 7 2 - Two ...
2k views

### Can somebody answer this 'Crack the code'?

Can somebody answer this? It was given to me as a challenge and I am having doubts in my answer Text version: 2 6 5 7 - Has two correct digits but neither are in the correct place 0 4 1 5 - Has ...
726 views

### Crack the code? Puzzle [closed]

Crack the code . Can you. Then you will be genius.
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 ...
• 22.8k
212 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 ...
• 35.6k
2k 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 ...
259 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 ...
• 1,605
985 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 ...
• 1,605
3k 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 ...
• 161
1 vote
425 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 are correct but wrong ...
• 347
265 views

### Adaptation of Cows and Bulls [closed]

So as all of you know, Cows and Bulls is a pen and paper adaptation of the popular board game Mastermind. I would like to design a game that would allow duplicate numbers for the code and assign ...
432 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 ...
• 30.2k
984 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 ...
• 3,699
28k views

### Crack the 5 digits code

I created this "crack the code" puzzle. I hope the members here like it.
• 600
590 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%); ...
• 281
2k 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 ...
• 10.5k
511k views

### Crack the lock code

Does any one know how to crack this? I got this as a challenge.
• 845
2k 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, ...
• 231
750 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?
• 6,701
3k views

### Guess my number [duplicate]

There is a popular game called Mastermind in which one player guesses another player's secret sequence - it could be a word, some colors, or numbers. The guesser says a possible sequence, and they ...
• 30.2k
4k 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). ...
632 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 (...
• 6,936
2k views

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

I'm bad at this sort of optimization problem 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 four ...
• 385
3k views

### House Number Mastermind

I was having a house-leaving party at my old house, and challenged four of my friends to guess the number of the new address, which had three digits. The responses I got were 280, 376, 304, and 370....
• 6,021