Jane Street Puzzle: ‘Pent-Up’ Frustration 3 / Knight Moves 7

Introduction In Jane Street’s latest puzzle, ‘Pent-Up’ Frustration 3 / Knight Moves 7, we’re given the following prompt The board above has been tiled with the 12 pentominoes (plus a 2-by-2 tetromino) into 13 regions. Think of each of these 13 regions as constructed out of 1-by-1-by-1 cubes. We need to add a tower to each region. A tower is an additional size-1 cube placed on one of a region’s…