Two players are playing a variant of chess on a 8x8 grid. The first player controls a white knight that starts in the top-left corner. The second player controls three black knights that start in the other three corners. The first player aims to avoid being captured for as long as possible, while...

This is a follow up to A knight chased by three knights Two players are playing a variant of chess on a 9x9 grid. The first player controls a white knight that starts in the centre square. The second player controls four black knights that start in the corners. The first player aims to avoid bei...

I was pretty board in the lockdown so I thought up a mathematics puzzle, which I haven's solved yet, so the community can solve together. Let $n>1$ be a positive integer. There is a square castle with $n^2$ rooms, $n$ columns and $n$ rows. Each room lives a knight or a knave. Knights always t...

Stuck with this for long time now, applied all the techniques i can think of Blank: All possibilities: missed 6 as possibility in R8C5 Verified that this has unique solution

I'm stumped on this puzzle! Here is a link to a Google Spreadsheets that gives you information! https://docs.google.com/spreadsheets/d/1ffxFgNtpbfhNELp8z9fv1R6Uc02BmBeR6cUG3EKXehw/edit#gid=0

You are given two strings A and B, each with length N. Let's index the characters in each string from 0 ― for each i ( 0 ≤ i< N), the i+1-th characters of A and B are denoted by Ai and Bi respectively. You should convert A to B by performing operations of the following type: Choose a subset S of...

The answers to the following cryptic clues all belong to a certain group. The definition part of each clue has been replaced by a number. Another number, hidden in the puzzle, gives a hint toward figuring out the identity of the group. The checkmark is given to the first answer to explain the wo...

What could be a good logic (not asking for any programming code here) to generate a grid of numbers from a pixel picture from the example below: Picture: I just need the numbers, I mean, the logic (for each color) to generate the link between pixels to generate the full picture. Thanks for a...

Kurt, our crusty old mainframe admin, finally retired last week and I've been given the task of sorting through his files. Most of the files were comprehensible, if not understandable, like his old ~/.signature files with gems like "Everything I needed to know I learned in VAX/VMS." and "Solaris ...