Uma Musume Affinity Solver
Optimize your breeding inheritance. Calculate the perfect ◎ pairing based on character relationships and shared G1 race glory.
Parent Line 01
Parent Line 02
Parent Line 1 Affinity
Parent Line 2 Affinity
The Science of Uma Musume Breeding Compatibility
In Uma Musume Pretty Derby, winning the G1 races is a matter of stats, but creating a champion starts in the breeding screen. **Affinity (相性, Aishō)** is the most crucial mechanic that determines the success of Factor Inheritance. Our tool allows you to pre-calculate these hidden values to ensure you aren't wasting your TP on bad training runs.
How to Use the Affinity Calculator?
Step 1: Select the Child. This is the horse girl you intend to train. Character specific relationship points are calculated based on her.
Step 2: Assign Ancestry. Choose the two parents and their respective grandparents. A total of 7 characters are required for a full calculation.
Step 3: Analyze the Breakdown. Our 2026 Pro Solver checks for G1 race win history and historical rivalries between all members of the family tree.
Step 4: Aim for ◎. If your total score exceeds 151 points, you will see the double circle (◎) icon, which exponentially increases the chance of inheriting powerful 3-star factors.
Why Use TrendCart's Pro Solver?
Standard calculators often ignore the **Grandparent-Grandparent** relationship or shared **G1 Race Bonuses**. TrendCart Tools uses the latest 2026 data weights which include:
- Historical rivalry points (e.g., McQueen vs Teio).
- Same-stable bonuses.
- Classic Triple Crown shared victory bonuses.
- Bloodline overlap penalties.
Breeder Pro Tips
"Don't just chase stats. A high affinity (◎) inheritance can give you 100+ extra power points and 5+ skill levels in a single inheritance phase, which is impossible to reach through standard training alone."
Understanding the Affinity Symbols
The symbols represent numerical brackets:
- ◎ (Excellent): 151+ Points. The gold standard. High chance of blue star explosions.
- ○ (Good): 111 - 150 Points. Solid for casual runs and daily missions.
- △ (OK): 71 - 110 Points. Minimum viable compatibility.
- × (Poor): Below 71 Points. High chance of failing inheritance.
From the URA Finals to Champions Meetings, the path to the winner's circle is paved with data. Let TrendCart Tools be your strategic partner in every breeding decision.