maze, labyrinth puzzle game. riddle, brain-teaser game concept solvable

boardgame brain brainteaser challenge chess cipher concept confuse confusion difficult difficulty dilemma easy enigma figure game geometric geometry intricacy jigsaw jumble labyrinth line map maze mission muddle mystery objective out perplex perplexity play problem puzzle puzzlement puzzler riddle secret solution solvable solve tangle target task teaser think thinking treasure twister unsolved vector