Questions tagged [logical-deduction]

Question 1

I’ve made a small browser puzzle called Codextri where you have to identify a hidden set of three letters by guessing words. Each guess returns a score based on how many of those hidden letters your ...

Question 2

Rules to fill out the grid: I must use 3 of each symbol in each row, and in each column. I cannot use 3 consecutive identical symbols (horizontally or vertically). A solid border indicates that the ...

Question 3

Here is (yet another) prisoner riddle. I made it up (maybe it was asked before, but to the best of my knowledge I'm the first to ask it - correct me if I'm wrong). There are 1000 prisoners who are ...

Question 4

This is a lightweight puzzle, hopefully entertaining but not difficult. Since my FIDE rating for classical Chess is 2343 at the time of writing, I recommend you do not post a solution to this puzzle ...

Question 5

LinkedIn's Queen #564 (HARD difficulty) I am watching the commentary of today's Queen puzzle (a 1* Star Battle puzzle), given that I complete it in about 2 minutes. But one thing I don't quite ...

Question 6

Here's a famous Lewis Carroll problem: Babies are illogical Nobody is despised who can manage a crocodile Illogical persons are despised The conclusion is: Babies cannot manage crocodiles. I've ...

Question 7

1/2024 is equal to $0.000\overline{a9407114b245059c88d375}$. Can you find the values of a, b, c, and d without using a calculator? Long division is trivial. Can you use other ways to find the missing ...

Question 8

Puzzle You are on an island inhabited by three types of people: those who only tell the truth (knights), those who only tell lies (knaves), and those who sometimes tell the truth and sometimes tell ...

Question 9

I’ve been working on the following Nonogram and got stuck partway through. I’d like to continue logically rather than by guessing, but I’m not sure what the next forced step is. Here is my current ...

Question 10

The last number of months I have been reading about numerous ways on how to solve Sudokus. So far I am familiar with obvious and hidden singles, obvious, hidden and pointing pairs, obvious, hidden and ...

Question 11

For part C of the this problem: The Big Cube and Squares Puzzle, the solution states: However, 6 is not achieveable, because we can show by contradiction that there must be at least one 'move' that ...

Question 12

To allow new users to solve this puzzle and earn reputation points, I encourage all users whose reputation is 200 or more to not post an answer until 48 hours after this question is posted. Thank you! ...

Question 13

Preamble The late Dr. Bailey had a world class art collection. As stipulated in her will, 6 of her most prized positions were to be put up for auction between 6 companies and art collection groups ...

Question 14

In designing logical puzzles (example: grid-based deduction puzzles), difficulty can come from either logical dependencies or from search space. Is there a formal way to distinguish or measure these ...

Question 15

Some background first. The gimmick for this puzzle was inspired by a recent puzzle in a mathematics discord. As part of solving that problem I learned how to use a SAT Solver to generate cases. During ...

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Questions tagged [logical-deduction]

What is the optimum strategy for a logic word puzzle?

How do I proceed with this Tango puzzle?

prisoners riddle - a button, a light and a timer

My Most Recent Chess Tournament

Explain deduction from LinkedIn's Queen #564

Lewis Carroll with Probabilities

Find the missing digits in 1/2024

Knights, Knaves and Spies, unclear solution provided

Next logical deduction in this Nonogram?

Tips on solving sudokus linearly

Explain part of solution to "The Big Cube and Squares Puzzle"

With the help of the cows, can you determine the secret code?

An Auction House's Records Are Askew Requiring Help

What defines whether a puzzle’s difficulty stems from logic depth versus search complexity?

Sudoku Variant Puzzle

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