Top Descriptors variable timing Contains multiple timing points, usually required for songs not recorded to a metronome. , complex sv Features large changes in slider velocity. , circle only Restricts object choice to circles only. , progression Contains a gradual advancement in difficulty or concept across the map. , slider tech Tests uncommon skills involving sliders, such as heavy use of kicksliders or aim on complex slidershapes. , gungathon A map with a drain time of over 10 minutes. , reading Tests a player's reading skill, i.e. patterns that obfuscate note order and/or timing. , gimmick Focused on a single unique design or gameplay idea. , double taps Patterns that require tapping on both keys simultaneously, through 2B or very fast doubles. , complex snap divisors Uses mixed or unusual snap divisors in order to test the player's tapping ability.