1. Knight Distance Knight distance is a figure that represents the minimal move that will bring a knight to a specific square in chessboard. For example, knight distance when knight is on c4 goes: --- 2. Infinite Knight Distance … And what if the chessboard is infinite? Will there exist some squares that changes its value of knight distance when the chessboard is infinite? What I mean when saying infinite, it means below: For the case on c4, it doesn’t matter. --- So my question can be st...| Recent Questions - Puzzling Stack Exchange
Place a nonzero digit into some of the white cells of the grid. Shaded cells must remain blank. No digit can repeat in a row or column. In each row, the sum of the digits must be equal to some fixed value R (which you find during the solution). Similarly, in each column, the sum of the digits must be equal to some fixed value C. Circles in the grid give all the digits in the cells that touch the circle. (Including repeats; if two cells touching a circle have the same digit, the circle must co...| Recent Questions - Puzzling Stack Exchange
Note: I created this puzzle. Last year, 2024, when mistyped, can result in the years 22024, 20024, 20224, and 20244. Even if those "years" are very far from now, if you look on a cellphone calendar that supports 5-digit years or on WolframAlpha, you would see that all of them, except for 20224, have the same calendar as 2024. 20024, 20244, and 22024 are all mistyped years of 2024, and all of those start on Monday and are leap years. What are the years N in Gregorian Calendar, such that all mi...| Recent Questions - Puzzling Stack Exchange
What is the link between these actors?: Sylvester Stallone, Rutger Hauer, Orson Welles, Pierce Brosnan, Gary Oldman, Bruce Willis, Max Von Sydow.| Recent Questions - Puzzling Stack Exchange
A unique puzzle for analytical minds. Do you dare to solve it? Rules: Fill the grid with all two-digit numbers (from 00 to 99), with no repetitions. In each row and each column, no two numbers may share the same tens digit. In each row and each column, no two numbers may share the same units digit. The colors are decoration. It sounds simple... until you try it. Good luck!| Recent Questions - Puzzling Stack Exchange
17032110, 878, 85671510011, ? A numerical sequence I created.| Recent Questions - Puzzling Stack Exchange
Here's a Scrabble puzzle that Nick Ballard and I composed, and recently presented at the MOVES conference. See the diagram below. The game is nearing its end and you’re in dire straits. On your last turn, you bingoed with GROGSHOP, but then your opponent immediately bingoed back with UNUSUAL, taking a commanding lead of 476 points to your 344 points. On your rack, you have MONKYSZ. The tiles unseen to you are DEFJLLLQW, two of which are in the bag and seven of which are on your opponent’s...| Recent Questions - Puzzling Stack Exchange
When I first received my instruction I thought I may have to shoot someone, however I quickly realised I was simply to make a gesture. On explaining it to my friend, they asked what I was to do with the branch. What was I instructed to do?| Recent Questions - Puzzling Stack Exchange
I was playing around with some ideas for a nice geometry puzzle involving circles on my iPad when my daughter saw it and said it looked like fire. I then added some background elements like the sun, the cloud, the sky, and the land, and now it looks like a tsunami of fire on a sunny day! Anyway, here’s the question. What fraction of the image is covered in fire? And more importantly, can you find it with as little calculation as possible? --- Clarifications: All curves in the fire are circu...| Recent Questions - Puzzling Stack Exchange
The God's number for the standard 3×3 Rubik’s Cube is well established as 20 moves. Is the God’s number for Christopher’s Jewel puzzle known, or are there any established upper or lower bounds? For context, Christopher’s Jewel is an octahedral twisty puzzle with 48 movable elements (please see the attached picture).| Recent Questions - Puzzling Stack Exchange
Boris and Dmitri can turn a command into a pellet and vice versa. Leonid and Konstantin can turn a musical phrase into a vegetable and vice versa. Mikhail and Nicolas can turn a language into a number and vice versa. Roman and Charlie can turn a millionaire into a scope and vice versa. Shannon and Pavel can turn a vehicle into an animal and vice versa. What am I doing here?| Recent Questions - Puzzling Stack Exchange
Recently-engaged celebrity that's initially fifthly onboard, without author backing, roily like racers (6 5) What is the answer to this topical cryptic clue?| Recent Questions - Puzzling Stack Exchange
A Logician has 4 students. He decides to test them. He writes a number on a piece of paper and folds it. He says: “Listen. I have written a 2 digit positive integer on this paper and Raj, Ken and Amy will get to see it. Those three are allowed one correct written statement about the number without actually disclosing the number. Your written statement - which could be a clue - will allow Lisa to guess the number. Do not make it easy on her. You must be truthful.” Raj looks at the number, ...| Recent Questions - Puzzling Stack Exchange
Try to make all numbers 1-40 using the digits 2, 0, 2, 6. Rules: Use all four digits exactly once. Allowed operations: +,−,×,÷,! (factorial), $x^y$ (exponentiation), √ (square root). Parentheses and concatenation are allowed. (e.g. 20+2×6). Squaring uses the digit 2. The modulus operator is not allowed. Rounding is not allowed.| Recent Questions - Puzzling Stack Exchange
This site has computer generated slitherlink puzzles that can be solved using the methods discussed in this Q&A SlitherLink on moderate or large boards: going beyond 0s and 3s For the largest regular puzzles (25x30, hard), and applying the techniques in the question linked above, I can solve such puzzles in about an hour, if I am lucky. My "record" is 49 minutes. I have all the assistants turned on (such as automatically marking completed squares). To complete such a puzzle in an hour, one ne...| Recent Questions - Puzzling Stack Exchange
We have many puzzles to find complete knight's tours – including on 4D boards, irregular boards and nonplanar boards – but few puzzles to find partial tours where only some cells are visited. I present a puzzle of the latter type below. On an 8×7 board, can 26 cells be labelled 0 to 25 inclusive such that 0-1-2-…-25-0 is a closed knight's tour and every even number n is also a knight's move away from (n+7) mod 26? Can the same be done on an 8×6 board? A 7×7 board?| Recent Questions - Puzzling Stack Exchange
Here's a circular chip with three evenly spaced notches. Two such chips can be attached as shown, where the "boundary circle" of each chip goes through the center of the other, and the planes of the two chips are orthogonal. I have been trying to make a closed loop out of such chips but the best I have so far is the following (made in Geogebra). The two red circles at the top intersect nontrivially and the angle between them is about 130º, so this certainly doesn't lead to a closed loop, but...| Recent Questions - Puzzling Stack Exchange
Note: I created this puzzle. A person has a phobia on certain dates - January 15 and February 3. While some dates like April 15 and July 24 also appear unlucky, that person is more afraid of those first two dates. That person does not like evil. Why? Hint:| Recent Questions - Puzzling Stack Exchange
Qwirkle tiles are identically-sized squares. Each has two attributes: one of 6 symbols and one of 6 colors. There are 3 tiles for each combination of symbol and color, thus 6×6×3 = 108 tiles. We want to fit these on a square grid (at most one tile at each position), while respecting standard Qwirkle constraints: Each horizontal or vertical segment of consecutive non-empty grid squares has tiles with either the same symbol and different colors, or the same color and different symbols. It fol...| Recent Questions - Puzzling Stack Exchange
While walking through a city, I noticed four curious things. Each one had a name that, in the local tongue, rhymed perfectly… There was one that needed mended, right where the property ended. There were some on an old man's face, where a bird must have been placed. Another was round his chin, right below that grin. I didn't see another, 'cos I was called in by my mother. Can you figure out where in the world I am? This was inspired by... Edit: The answer is a particular locale/region. Hint ...| Recent Questions - Puzzling Stack Exchange
Finally, you've made it to PuzzleWorld™! You're eager to enjoy activities such as riding the world-famous Non-Euclidean Coaster, taking a leisurely boat ride across the river with some number of wolves and sheep, and spending exactly $100 at the gift shop afterward. There's just one problem: two guards stand before you, blocking the entrance. Of course, you think to yourself. It wouldn't be PuzzleWorld™ without a riddle at the gate. You already know the rules, but even so, one of the guar...| Recent Questions - Puzzling Stack Exchange
Fill the squares with the right tetrominoes, so each tetromino contains numbers 1 to 4. Example:| Recent Questions - Puzzling Stack Exchange
I came up with a logic puzzle inspired by this xkcd comic. I don't yet have an answer, and I am wondering if anyone can come up with one. You are in a room with three doors. Two of the doors lead out, but one of them leads to certain death. Each door has a guard holding a spear stationed in front of it. One of the guards always lies, one always tells the truth, and the third guard will fatally stab you if you ask a tricky question. If the question isn't tricky, he will tell the truth. For thi...| Recent Questions - Puzzling Stack Exchange
3 2 1 4 1 2 3 3 3 3 3 4 6 4 4 2 3 4 4 3 1 1 2 4 3 The 5x5 table above contains numbers. A number X represents a statement that this cell is surrounded by (among its 8 neighbours) X true statements. If the number is 3 means the cell is surrounded by 3 true statements. We can say all statements are false, but this is not what I want. Some statements are true and some are not. Create another 5x5 table with boolean (T/F) input, to show which statements are true, and which statements are false. ex...| Recent Questions - Puzzling Stack Exchange
Problem: You're a vegetable gardener planning to plant out seedlings in a new garden bed, however your farmer's almanac has outlined a system of rules about what plants can and cannot be placed next to each other. Your job is to map out a garden bed/s that will provide the most benefits to the plants within. Each plant has 5 classes of companion plant associated with them, ranging from mutually beneficial plantings to stunting or being stunted by neighbour plants. For example, the rules for p...| Recent Questions - Puzzling Stack Exchange
NOC +10 On March 6th, 2015, a YouTube channel named "Noc +10" was created. Since that day, this channel is uploading some really darkly mysterious videos. I will start saying something about the name of this channel, which is pretty odd, indeed: searching on Google for "NOC +10" you can easily find out that it may refer to the Naval Operation Concept 2010, also represented with the acronym "NOC 10". 1. First contact - March 7, 2015 0101 0101 0000 0001 The first video uploaded by Noc +10 on Ma...| Recent Questions - Puzzling Stack Exchange
Choose the conclusion that validly follows from the argument below. Some apples are edible. This means that there is at least one apple that is edible. No edible food is rotten. Therefore A. All apples are not rotten. B. Some apples are rotten. C. Some apples are not rotten. D. All apples are edible. E. B and C| Recent Questions - Puzzling Stack Exchange
It's been well known for a few years now that every Rubik's Cube scramble can be solved in 20 moves. However, this is only for the case where the orientation of the centers is not taken into| Puzzling Stack Exchange
I received a note from a friend, a scientist and amateur mathematician, who seemed to be going away on a mysterious trip. The address of the place he said he'll be staying is Nice Blan Hall .k.v But the country code was missing. Can you help me find where he is a going?| Recent Questions - Puzzling Stack Exchange
In the image you can see twelve mutation chambers (A to L). Each alien on the left side of the aliens goes through the three mutation chambers of its right side. The alien on the right side is the ...| Puzzling Stack Exchange
This matrix came up on a practice aptitude test I'm taking.| Puzzling Stack Exchange
Put the numbers from 1 to 6 in the puzzle in a way such that: In each row or column there shouldn't be duplicate numbers. The squares that are joined together have the same number.| Puzzling Stack Exchange
In this puzzle, when you click an arrow, all arrows immediately next to it (diagonally included), as well as the arrow you clicked itself rotate 90 degrees. The goal is to get all the of arrows to...| Puzzling Stack Exchange
This is a puzzle with both the computer-puzzle tag and the no-computers tag. We have the following list of five fractions: 11/5, 30/77, 1/11, 21/2, 5/7 Starting with an integer x, we perform the| Puzzling Stack Exchange
A polycube is a three dimensional generalisation of polyomino, i.e., it is formed by gluing unit cubes along their faces. Given a cube of side n, one can easily dissect it into n congruent polycube...| Puzzling Stack Exchange
I have found a few 11-letter words that use every key except 0 or 1 on a standard telephone (like EXPLORATION), but I haven't found any shorter such words. What is the shortest word we can make tha...| Puzzling Stack Exchange
What do these figures share in common?| Puzzling Stack Exchange
Playable Version This is follow-up version of How quickly can you solve the Change Change game?. Every rule is the same but only the arrangement is a little more challenging. Challenge Slide the ci...| Puzzling Stack Exchange
This is annoying. I got so close to finishing my latest puzzle but with one clue left, a clue I couldn't understand even once I gave up and checked the solution. This is from the Sunday Times Quick| Puzzling Stack Exchange
Knowledge of the ruleset of Origami Puzzles is assumed.| Puzzling Stack Exchange
Penpa link: VsxDk . This line is not a puzzle. Note: Editted puzzle name to avoid some potential confusion. This line is not a puzzle. To clarify: Please entirely disregard the previous title. This...| Puzzling Stack Exchange
I made a mistake and σρουψηρδ κτιβπατδς! What did I do? Sent from my iPhone. Hint:| Puzzling Stack Exchange
I've created a series of browser-based logic puzzles designed to be solved in sequence. Once you solve one puzzle correctly, you'll be automatically redirected to the next stage. At the moment, the...| Puzzling Stack Exchange
Puzzlein’ Nonogram — Solve the puzzles. Inspired from this great puzzle by @DyingIsFun. Click the image for larger view. (59x59) I’ll not require the full logical step. (If I do, I’ll be busy| Puzzling Stack Exchange
The answer is a fitting 11-letter phrase. Hint 1 Hint 2 (stronger)| Puzzling Stack Exchange
Recently, I got an IKEA LILLABO train set for my daughter. It has twelve curved segments, each is 1/8th of a circle of radius 1, two straight segments of length 1, and a bridge of length 2 (in top ...| Puzzling Stack Exchange
The great English detective Sherlule Polmes is visiting his friend, a great French inventor. The reason? A suspected poisoning! Eating his new wife’s stew, the inventor came near to death! The clas...| Puzzling Stack Exchange
What number comes next in this sequence? 40, 0, 2, 1, 0, 10, 50, 4, 0, 16 Answers must have an explanation of why the next number is what it is. Hint:| Puzzling Stack Exchange
Grelling's Paradox is about certain types of words. An adjective is heterological if it does not describe itself, like 'long', 'German', or 'monosyllabic'. An adjective is autological if it does| Puzzling Stack Exchange
