I want to fully tile an 8x8 board using the 19 fixed Tetrominoes, without any hole. For example, this is a valid solution: I am looking for a list of all solutions or an algorithm that can find all the solutions.

The band director is tired of the flutes passing notes in class, but he can't tell what the notes say. Here is one of the messages. 2 10 - 1 2 3 10 - 1 2 10 - 1 2 10 - 1 2 3 10 - 1 2 3 4 8 9 10 1 2 3 4 - 1 2 3 10 - 2 10 - 1 2 3 4 8 9 10 What are they saying? (_ˇ෴ˇ)_⟋ 🎵🎶 (づ🪈◕‿◕ )づ日 ٩(◕‿◕)۶🪈

The goal of Hidato is to fill the grid with a series of consecutive numbers adjacent to each other orthogonally or diagonally, and all tiles are required to be filled in. So, as you may or may not know, I like creating Hidato puzzles sometimes. I usually try to make my Hidato puzzles big, but st...

Two trains are heading towards each other on a track. One train is blue, the other is green. Each train has a locomotive hauling nine wagons. Each locomotive is 10 meters long, and each wagon is also 10 meters long. Between the trains, there is a small area with a parallel 40 meters track accessi...