osu! Impact Difficulty Potential (IDP) Calculator
The osu! Impact Difficulty Potential (IDP) Calculator is a tool designed to provide a hypothetical numerical score representing the inherent difficulty and intensity of an osu! beatmap based on several key map characteristics. While not an official osu! metric, this calculator offers a way to quantify how various elements like speed, precision, and reaction time demands contribute to a map's overall challenge.
Understanding a map's IDP can help players gauge the potential impact a map might have on their performance, stamina, and accuracy. It's important to remember that this is a simplified model, and actual difficulty is highly subjective and depends on individual player skill, mod usage, and specific map patterns not captured by these basic metrics.
How the IDP Score is Calculated
The IDP score is derived from a combination of common beatmap attributes, each weighted to reflect its contribution to difficulty:
- Map BPM (Beats Per Minute): Higher BPM generally means faster note density and quicker required actions.
- Approach Rate (AR): Determines how quickly hit objects fade in and out. Higher AR demands faster reaction times.
- Overall Difficulty (OD): Dictates the strictness of hit windows for accuracy. Higher OD requires more precise timing.
- Circle Size (CS): Defines the size of hit circles. Smaller CS requires more precise cursor movement.
- Total Hit Objects: The total number of circles, sliders, and spinners in the map. More objects imply higher action per minute.
- Map Length (seconds): The duration of the playable section of the map. Longer maps test stamina and consistency.
The calculator uses a proprietary formula that combines these factors to produce a single IDP score, giving you an estimate of a map's "impact" on a player.
Calculated IDP Score:
Example Scenarios:
Let's look at how different map characteristics can influence the IDP score:
- Beginner Map: BPM 120, AR 5, OD 5, CS 4, Objects 500, Length 60s. (Lower IDP)
- Intermediate Map: BPM 180, AR 8, OD 7, CS 4, Objects 1500, Length 120s. (Medium IDP)
- Expert Map: BPM 240, AR 10, OD 9, CS 3, Objects 3000, Length 180s. (High IDP)
Experiment with the values in the calculator to see how each factor contributes to the overall Impact Difficulty Potential!
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