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osu!Skill Wiki

Complete documentation on how osu!Skill analyzes your gameplay and what all the numbers mean.

Overview

What is osu!Skill?

osu!Skill is a comprehensive skill analysis system that goes beyond the traditional PP (Performance Points) system. It analyzes your recent gameplay against your peak performance to determine your current skill level and consistency.

Key Philosophy: Your skill is measured by how well you're currently performing compared to your peak ability, not just your highest PP scores.

The system uses three main components: Recent Skill (your current performance), Peak Skill (your best historical performance), and Skill Match (how close you are to your peak).

Quick Start Guide

Check Your Profile - Log in with your osu! account to see your current skill analysis.
Understand Your Verdict - Your verdict tells you how well you're performing compared to your peak.
Review Insights - Get personalized recommendations based on your play patterns.

Core Metrics

Recent Skill

Measures your current skill level based on your recent plays (up to 30, only from the last 24 hours). This considers accuracy, star rating, mods, and temporal decay to emphasize newer plays.

Range: 0-200+ (higher is better)

Peak Skill

Measures your historical peak performance based on your top 25 plays by PP. This represents what you're capable of at your best.

Range: 0-200+ (higher is better)

Skill Match

The percentage of your peak skill that you're currently maintaining. This is the primary indicator of your current form.

Formula: (Recent Skill / Peak Skill) × 100 × Reliability Factor

Range: 0-100% (higher means closer to peak)

Confidence

Indicates how reliable the analysis is based on data quality, play volume, diversity, and consistency.

Range: 0-100% (50%+ recommended)

Verdicts Explained

Accurate (92%+)

You're performing at or very close to your peak skill level. Your current rank accurately reflects your ability.

Slightly Rusty (75-91%)

You're performing slightly below your peak but still maintaining good form. Minor practice should restore peak performance.

Rusty (55-74%)

Noticeable decline from peak performance. You may need more practice to return to your best form.

Overranked (35-54%)

Significant gap between current and peak performance. Your rank may be inflated compared to current skill.

Inactive (<35%)

Very low recent activity or performance well below peak. Extended practice needed to restore skill.

Insufficient Data

Not enough recent plays or confidence too low for reliable analysis. Play more to get accurate results.

Calculations

Skill Components

Each play is broken down into three skill components:

Aim Skill (45% weight): Based on star rating, AR (Approach Rate), and accuracy. Higher star ratings and AR values increase aim skill.
Speed Skill (35% weight): Based on BPM and star rating. Faster maps and higher star ratings increase speed skill.
Accuracy Skill (20% weight): Rewards precision, especially on harder maps. Accuracy above 90% is heavily weighted.

Mod Multipliers

Different mods affect skill calculations:

Single Mods: - HD: 1.06x - HR: 1.12x - DT/NC: 1.18x - EZ: 0.88x - HT: 0.82x - FL: 1.15x

Combinations (override single mods): - DTHRHD: 1.35x - DTHR: 1.28x - DTHD: 1.24x - HRHD: 1.18x

Temporal Decay

Older plays are weighted less to emphasize recent performance:

≤14 days: 1.0x
15-30 days: 0.95x
31-60 days: 0.85x
61-90 days: 0.75x
91-180 days: 0.6x
180 days: exponential decay

Advanced Features

Confidence System

Confidence indicates how reliable the analysis is. It's calculated from four factors:

Volume (35%)

Based on number of recent plays. More plays provide more data points for analysis.

Best results: 25+ plays

Diversity (25%)

Based on unique beatmaps played. Playing different maps prevents over-specialization.

Best results: 15+ unique maps

Recency (25%)

Based on how spread out your plays are across different calendar weeks.

Best results: 6+ different weeks

Consistency (15%)

Based on accuracy standard deviation. More consistent accuracy indicates stable skill.

Best results: <5% accuracy deviation

Confidence Formula: (Volume × 0.35) + (Diversity × 0.25) + (Recency × 0.25) + (Consistency × 0.15)

Data Requirements

Minimum Data

Recent Plays: 6 minimum, 30 maximum (used plays from the last 24 hours)
Top Plays: 8 minimum, 25 maximum used
Confidence Threshold: 20% minimum for basic analysis

Data Validation

Each play must have valid: - Accuracy (0-100%) - Star rating (0-12*) - AR (0-11) - BPM (30-600) - Timestamp

Limitations

Important: osu!Skill is a supplementary tool, not a replacement for official rankings.

System Limitations

Data Dependency: Requires sufficient recent play data for accurate analysis
Skill Aspects: May not capture all skill nuances (reading, flow, etc.)
Mod Complexity: Simplified mod multipliers may not reflect true difficulty
Map Variety: Analysis quality depends on map diversity

Best Practices

Play regularly for accurate analysis
Play diverse maps and difficulties
Focus on improvement, not just the numbers
Use insights to identify improvement areas
Aim for 50%+ confidence for reliable results