Fill up the grid with the letters 'P', 'U', and 'Z' in the following way7yr ⋅ uwnojpjm-39732 ⋅ se/puzzling
Cryptic-ish crossword - contains some neologisms, all of them to be found in the OED10yr ⋅ a-e-4050 ⋅ se/puzzling
When and where was the first logic-grid-based puzzle published?10yr ⋅ james-jenkins-126 ⋅ se/puzzling
Puzzle that consists of all possible combinations of pieces containing 5 squares8yr ⋅ brian-leeming-27214 ⋅ se/puzzling
Termite eating through a large cube composed of 27 smaller cubes while not moving diagonally9yr ⋅ marconius-14080 ⋅ se/puzzling