After a very close call the last time he was making a flight for the mafia, Barry received a new set of orders for his next flight. With the Don's newest encoding scheme, there would be no more need to brute force or guess at any part of the solution like last time. Barry looked at the message s...

Alberto places N checkers in a circle. Some, perhaps all, are black; the others are white. (The distribution of colors is random.) Betiil places new check-ers between the pairs of adjacent checkers in Alberto's ring: she places a white checker between every two that are the same color and a black...

I would like to union two puzzles in one. The first puzzle is a slitherlink, the second is a nonogram. The main idea is: the slitherlink's solution is the entrance for the rows of the nonogram. In the slitherlink one can use only five labels: 0, 1, 2, 3 and None. In my case I used 1, 2, 3 (left ...

My prefix makes rulers, My suffix is ruled, My infix describes its own letters, My whole keeps food cooled.

Background Lately I've seen a large profusion of word puzzles on this site that go like this: My prefix is [], My infix is [], My suffix is [], My whole is [] where the goal is to figure out what word the user is talking about. Example, Example, Example, Example, Example, Example, and there are...

{"status": "so far, so good!", "riddle_1": "40 49 55 32 60 32 52 42 51 43 53 41 32 124 124 32 40 56 42 50 32 61 61 32 52 42 52 41 32 38 38 32 33 40 51 43 51 32 61 61 32 54 41", "riddle_2": "33 98 32 63 32 33 98 32 58 32 98", "hint": "Give answers to Gollum() ;) ", "alert": "You have just 10 chanc...

There are a dozen places; one is different from the others. The first could change one's state long ago. All can be found in arithmetic. 2-4-16-2-12-18-4

Suppose we have the pyramid [The puzzle is from an example test for admission to a postgraduate degree at Sofia University, Faculty of Mathematics and Informatics, publicly available at: https://www.fmi.uni-sofia.bg/sites/default/files/documents/priem/msc/example_test_kandmag_inf.pdf] Which numb...

During lock-down I was feeling a bit lost for something to do, so one one day I sent Ernie a text reading "Bored". He responded with a text-less message and an attached image (see below). I wasn't sure what it meant so I sent "?", to which he responded "It's a puzzle!". It still wasn't obvious wh...