Parenting & Affinity Guide
Global Server. Experienced Reference · Updated May 2026
Overview
Compatibility System
Overall compatibility (◎/○/△) is the sum of individual compatibility scores across your entire lineage. The individual score per parent or grandparent is what drives actual gene proc rates, a ◎ overall can mask a weak grandparent that tanks proc rates on that branch.
How Points Are Earned
Building Compatibility
| Source | Points |
|---|---|
| Shared G1 race win | +1 |
| Shared G2 race win | +1 |
| Shared G3 race win | +1 |
| Title bonus (per title) | +1 |
No bonus for winning the same race twice. One win per race, regardless of Classic or Senior.
| Title | Required Races |
|---|---|
| Classic Triple Crown | Satsuki Sho · Japanese Derby · Kikuka Sho |
| Triple Tiara | Oka Sho · Japanese Oaks · Shuka Sho |
| Spring Senior Triple Crown | Osaka Hai · Tenno Sho (Spring) · Takarazuka Kinen |
| Autumn Senior Triple Crown | Tenno Sho (Autumn) · Japan Cup · Arima Kinen |
| Tenno Sweep | Tenno Sho (Spring) + Tenno Sho (Autumn) |
| Dual Grand Prix | Takarazuka Kinen + Arima Kinen |
| Dual Miles | Yasuda Kinen + Mile Championship |
| Dual Sprints | Takamatsunomiya Kinen + Sprinters Stakes |
| Dual Dirt | Champions Cup + February Stakes |
Full list at U-Tools: xn--gck1f423k.xn--1bvt37a.tools/announcements/3
Strategy
- Overlap as many G1, G2, and G3 races as possible across the entire lineage.
- Pair Crown-route Umas with Crown-route parents; Tiara with Tiara.
- Stack title bonuses. Triple Crown + Autumn Triple Crown can add 2 points per parent-GP link.
- In Trackblazer scenario, 50–63 bonus race points are achievable for mile/mid Umas.
- Super Parents (60+ overlapping wins) are buildable on Global in the legacy affinity system.
Inheritance Impact
The Inheritance Formula
base_rate × (1 + individual_compat / 100) = final_proc_rate
Grandparent proc rates are roughly half of parent rates. GP compatibility is weighted lower by design.
Global Scenarios
Scenario Tier List
The premier Global parenting scenario. Farm aggressively before the affinity rework makes G2/G3 races worthless.
- Stack 50–63 bonus compatibility race points with a mile/mid Uma.
- Climax genes grant Stamina + Guts, the strongest combination.
- Umas without mile aptitude are severely limited here.
- G2/G3 races will lose compatibility value when the JP-style rework reaches Global, this window closes.
Decent SP yield. Lower ceiling for compatibility building compared to Trackblazer.
- Expect 3,000+ skill points.
- Goddess card provides access to Uma Konomi and similar mid-run skills.
- Stamp collection RNG introduces inconsistency.
- Not all Umas benefit equally from stamp mechanics.
Niche tool for bridging incompatible aptitude ranges. Hard-capped at ~16 overlap races.
- Temporarily grants all Umas A-rank Turf and Mid-distance aptitude for the scenario.
- Use this to pair short/mile Umas with mid/long parents without tanking compatibility.
- The scenario aptitude buff does NOT make Turf/Mid genes eligible, you must raise those naturally.
- Mini genes cover all 5 stats individually.
- Requires at least 2 Speed cards + Mei friend card; weak decks will drop scenario races.
Only worth running if specifically targeting Unity Cup Power/Int scenario genes or the Int gene for Nige meta.
- Riko support provides ~150 Stamina + 100 Guts from events regardless of deck.
- Lower energy consumption and fewer rest turns than URA.
- Max rank is S+ without heavy whale investment.
- Unity Cup Int gene remains relevant for Nige/Runner builds.
Baseline option. Worth running only for URA-specific essence skills.
- Post-rework scenario genes are improved.
- レースの真髄・低 (Race Essence Low) is a top-tier inheritable skill unique to this scenario.
- Difficult to roll SS grade consistently.
- Auto-run enabled.
The Core Mechanic
Inheritance Formula
base_rate × (1 + individual_compat / 100) = final_proc_rate
Base Proc Rates (0 compatibility, multiply by formula above)
| Gene Type | 1★ Base | 2★ Base | 3★ Base |
|---|---|---|---|
| Blue Stats | 70% | 80% | 90% |
| Red Genes & Aptitude Whites | 1% | 3% | 5% |
| Green (Unique Skill) | 5% | 10% | 15% |
| Race Genes | 1% | 2% | 3% |
| White Skills / Scenario / Hidden | 3% | 6% | 9% |
Source: Polaris (@BourBon_Polaris) 100-run controlled dataset. Gold inheritance event is a visual indicator that a 2★ or 3★ procced, no additional mechanic.
Gene Types
Blue · Red · Green · White
Generated at run end. One stat is selected at random (20% per stat), then star quality is determined by that stat's rank. Both initial inheritance and mid-run inheritance give stat bonuses.
Star Quality by Stat Grade
| Score Range | Rank | 3★ Chance |
|---|---|---|
| 1,200+ | SS+ | 10.4% |
| 1,150–1,199 | SS+ | 10.7% |
| 1,100–1,149 | SS | 11.0% |
| 1,050–1,099 | S+ | 4.5% |
| 1,000–1,049 | S | 5.2% |
| 900–999 | A+ | 6.4% |
| 800–899 | A | 6.0% |
| 700–799 | B+ | 6.5% |
| 600–699 | B | 5.5% |
| < 600 | C+ | 0% |
Generated from any aptitude at A rank or higher. Probability is split equally among all qualifying aptitudes. S rank does not affect generation odds. Mid-run: a hidden 1–5 point roll determines aptitude gain.
Star Quality (fixed, all grades)
| Stars | Rate |
|---|---|
| 3★ | 10% |
| 2★ | 70% |
| 1★ | 20% |
Guaranteed to generate if the Uma is 3★ or higher. Star quality follows the same grade-band mechanics as white genes. Unique skill level does NOT affect star quality, this was debunked. Inherited unique skills cannot be passed down as white genes.
Star Quality by Uma Grade Band
| Grade Band | 1★ | 2★ | 3★ |
|---|---|---|---|
| Below SS (< 17,500) | 50% | 45% | 5% |
| SS to UE (> 17,500) | 20% | 70% | 10% |
| UE and above | 17.5% | 70% | 12.5% |
Generated from skills learned during the run. Must learn the skill during training. Only base versions generate, no Gold versions. Having the same skill in parent lineage increases generation odds exponentially (not linearly).
Generation Rate by Skill Type
| Type | Base Min | Base Max | Per Lineage |
|---|---|---|---|
| White skill | 20% | 35% | ×1.1 per |
| White skill ★ | 25% | 40% | ×1.1 per |
| Gold skill | 40% | 70% | ×1.1 per |
| Race gene | 20% | 35% | ×1.1 per |
| Scenario gene | ~20% | ~30% | ×1.1 per |
By Gene Type
Farming Strategies
Blue Genes
Push one stat to SS; accept the 20% lottery on which gets picked.
- Target SS+ in your primary stat for best 3★ odds (~10% per roll × 20% selection = 2% for a specific stat).
- B rank (600) is the hard floor for 3★ eligibility. Below that, only 1–2★ possible.
- Stack stat-specific support cards to push the target above 1,000.
- The 9★ (3★+3★+3★) target: pair one 3★ rental grandparent with one 3★ internal parent.
- After Trackblazer/later scenarios, all-SS statlines are achievable, plan decks accordingly.
Red Genes
Fewer A aptitudes = better targeting. Plan before the first turn.
- Priority order: Distance > Ground > Strategy.
- S rank Distance = +5% Speed bonus in races. The single most impactful red gene for PvP.
- S rank Ground = +5% Power. Universal applicability across all Umas and distances.
- S rank Strategy = +10% bonus, disproportionately strong for Nige (Runner) due to Position Keep mechanics.
- Count every A aptitude before starting. Each one dilutes the probability of getting the one you want.
- Never raise a B aptitude to A unless you specifically want that gene in the pool.
- Use Umas with fewer native A aptitudes as parents when targeting specific red genes.
Urara targeting Dirt
3 native A aptitudes (Dirt, Short, Sashi) = 33% chance per roll. Each additional A added to this by mistake drops it to 25% or less.
White Genes
Same deck. Same races. Same skills. Lineage overlap is everything.
- Use the same support deck for your training run as you used for your parents. Same deck = same skill pool = higher lineage overlap odds.
- Learn the Gold version of priority skills when SP allows. Jumps base generation to 40–70%.
- You MUST win a G1 race to generate the race gene. Second place is not enough.
- Scenario gene lineage: 0 common lineage = 19.9%, 6 common = ~30%. Stack common lineage.
- Skills received during inheritance events cannot generate genes, only skills you purchase.
- Save your race preset after a good parent run to reproduce the same race rotation.
Green Genes
Generation is guaranteed. Star quality is entirely about Uma grade.
- Green genes are guaranteed at 3★+ Uma, the generation rate is not a variable.
- Focus entirely on pushing Uma grade to SS and above for better star quality.
- UE+ (17,500+ score) gives 12.5% chance of 3★ green, the practical ceiling.
- High compatibility parents raise the proc quality during mid-run inheritance events.
- Unique skill level has zero effect on star quality, confirmed debunked.
Priority Order
What to Farm First
Distance Red Gene
S rank Distance = +5% Speed. Most impactful single stat for all PvP content.
Ground Red Gene
S rank Ground = +5% Power. Applies universally regardless of distance or strategy.
Usable Whites
Skill genes that match your Uma's running style. Conflicting whites are dead weight in every future run.
Strategy Red Gene
Max 1 per parent. Nige benefits most from S Strategy. Don't mix strategy genes.
Blue Genes
9★ (three 3★) is the practical target. Supports the stat floor for further runs.
Core Principles
Building Methodology
Match Running Styles
Never pair a Leader (Senkou) parent with a Runner (Nige) target Uma. Conflicting strategy whites are dead weight in the offspring's pool, and an accidental wrong-strategy red gene corrupts all downstream parents.
Same Deck, Same Races
Run the same support deck and race preset across your entire parent lineage. This stacks white gene lineage overlap up to the 70% ceiling and builds compatibility from matching race wins simultaneously.
Plan Red Genes Before Turn 1
Map every A aptitude your Uma will have at the end of the run before the first training turn. One accidental A from a raised B aptitude cuts your target gene odds by 25–33%. Plan, then execute.
Rentals Are Non-Negotiable
A strong rental covers one full side of the lineage at no cost. Five minutes on uma.pure-db.com finding the right parent beats 10 mediocre runs building it yourself. There is no excuse for using a random rental.
What Not to Do
Common Antipatterns
Avoid These
At a Glance
Quick Reference
Base Proc Rates by Gene Type and Star
| Gene Type | 1★ | 2★ | 3★ |
|---|---|---|---|
| Blue Stats | 70% | 80% | 90% |
| Red / Aptitude White | 1% | 3% | 5% |
| Green (Unique Skill) | 5% | 10% | 15% |
| Race Gene | 1% | 2% | 3% |
| White / Scenario / Hidden | 3% | 6% | 9% |
White & Green Star Quality by Uma Grade
| Grade Band | Score | 1★ | 2★ | 3★ |
|---|---|---|---|---|
| Below SS | < 17,500 | 50% | 45% | 5% |
| SS → UE | > 17,500 | 20% | 70% | 10% |
| UE+ | UE+ | 17.5% | 70% | 12.5% |
Blue Gene 3★ Chance by Stat Rank
| Rank | Score | 3★ Chance |
|---|---|---|
| SS+ | 1,150+ | ~10.7% |
| SS | 1,100+ | ~11.0% |
| S+ | 1,050+ | 4.5% |
| S | 1,000+ | 5.2% |
| A+ | 900+ | 6.4% |
| A | 800+ | 6.0% |
| B+ | 700+ | 6.5% |
| B | 600+ | 5.5% |
| C+ | < 600 | 0% |
Red Gene Star Quality (all grades)
| Stars | Rate |
|---|---|
| 3★ | 10% |
| 2★ | 70% |
| 1★ | 20% |
White Gene Generation Rates
| Type | Min | Max |
|---|---|---|
| White skill | 20% | 35% |
| White skill ★ | 25% | 40% |
| Gold skill | 40% | 70% |
| Race gene | 20% | 35% |
| Scenario gene | ~20% | ~30% |
Compatibility Thresholds
| Symbol | Points | Effect |
|---|---|---|
| ◎ | > 150 | All 6 blue stats avg, max proc rates |
| ○ | 51–150 | Avg 4–6 blues, reduced proc rates |
| △ | < 50 | Floor 4 blues, significantly reduced |
Scenario Gene Stats (Global Scenarios)
| Scenario | Stat 1 | Stat 2 |
|---|---|---|
| Trackblazer | Stamina | Guts |
| Grand Masters | Speed | Power |
| L'Arc (main) | Stamina | Power |
| Unity Cup | Power | Int |
| URA | Speed | Stamina |