mystifier

Noun

1.

mystifier - a particularly baffling problem that is said to have a correct solution; "he loved to solve chessmate puzzles"; "that's a real puzzler" Synonyms: puzzle, puzzler, teaser

amaze, baffle, beat, bewilder, dumbfound, flummox, get, gravel, mystify, nonplus, perplex, pose, problem, puzzle, puzzler, stick, stupefy, teaser, vex