I measure difficulty using a scale different from the CTC server. The two scales are comparable. This scale is inspired by the osu! difficulty scale and the MODS server's scale. My scale goes from 0 to 14 on normal puzzles, with higher difficulties representing harder puzzles. Yes, the scale goes above 14, but this blog rarely has a d15 or higher puzzle. Attached for each difficulty is an approximate real-life comparison in mathematics. d0 \ The easiest a puzzle can get. This difficulty is generally reserved for some joke puzzles or really easy example puzzles. These puzzles practically require no effort whatsoever. \ Real-Life Comparison: Addition and subtraction with integers d1 \ Most example puzzles fall in this difficulty. Puzzles here are almost never made as a joke, but are harder than d0 puzzles. This difficulty includes puzzles that many people, puzzle solvers or not, will find pretty easy. \ Real-Life Comparison: Multiplication and division ...