H&G All-Time Index v1.2.3 public fighter card
Jung Koo Chang
Jung Koo Chang ranks #203 in the H&G All-Time Index at Light Flyweight, with a 80.25 All-Time Index score and a 38-4-0 professional record. His career span on this page is 1980-1991. Jung Koo Chang was born in 1963; country context is South Korea. The rating dataset covers 28 bouts from 1980 to 1991. The strongest positive signals are elite wins and title record. The linked style guide points to pressure and volume with study notes on lower-weight tempo and angle changes. Peak-form reaches 1,838 in 1985.
Versioned rating. This profile belongs to H&G All-Time Index v1.2.3. Read exact ranks with the methodology and version notes, especially where Data Confidence is lower.
Rankings: H&G All-Time Index v1.2.3, computed from fights up to . Index and Peak-form Elo stay fixed to that fight-data cutoff; displayed records may include later record-only corrections.
Career highlights
Shown only where the v1.2.3 data supports the claim. Empty or unsupported fields are hidden.
Linked style profile
8-axis style breakdown
Jung Koo Chang also has a reviewed style profile with radar scores, study notes and diagnostic comparisons.
H&G All-Time Index profile - v1.2.3
Jung Koo Chang at a glance
A public H&G All-Time Index v1.2.3 visual. The curve shows yearly peak-form Elo rating points, not the 0-100 ranking index.
All-time rank
#203Ranked in the H&G All-Time Index v1.2.3 public top 1000
H&G All-Time Index
80.250-100 ranking index. This is the number that orders the list.
Peak-form Elo rating
1,838Best-point rating on a separate scale, not directly comparable with the index. Posterior band ±201. 1985-04-01
Division
Light FlyweightActive years: 1980-1991
Career record
38-4-0Published professional record summary
Data Confidence
MediumSolid but wider career evidence. Treat close ranks with extra care. Peak-form band: ±201 Elo.
Version
v1.2.3Current H&G All-Time Index release
Why this placement
Why this placement
Jung Koo Chang ranks #203 with a 80.25 score on the 60-100 H&G All-Time Index. The data-derived proxy signature-win marker points to a win over Sot Chitalada in 1984, because that defeated opponent carries a 1,776 Peak-form Elo in the same v1.2.3 export. The parsed-opponent data records one reversal pattern: he later lost to Sot Chitalada after an earlier win over the same resolved opponent. Data Confidence is Medium, so the rating should be read with wider uncertainty. Peak-form Elo is 1,838 (±201), separate from the 60-100 career Index.
Six-dimension breakdown
Bars show each weighted signal's relative size. Gold lifts the placement; grey holds it back.
Elite winsAbove the typical top-1000 fighter
How much the record is helped by wins over contemporaneous title-level opponents.
World-title recordAbove the typical top-1000 fighter
How much major title evidence supports the rating.
Cross-era separationAbove the typical top-1000 fighter
Same-era separation left after the shared peak and sustained rating signal is removed.
Top-level longevityAround the typical top-1000 fighter
How much repeat elite-year presence supports the all-time case.
Major title-control signalAround the typical top-1000 fighter
A narrow signal for lineal, explicit undisputed or major multi-belt class control in this release data; it is not a full title history.
Career rating profileAround the typical top-1000 fighter
Collapsed signal from peak rating, sustained rating and same-era separation.
| Rank | #203 |
|---|---|
| Rank detail | Ranked in the H&G All-Time Index v1.2.3 public top 1000 |
| H&G All-Time Index | 80.25 on the 0-100 ranking index scale |
| Peak-form Elo rating | 1,838 at 1985-04-01; separate scale; posterior band ±201 |
| Data Confidence | Medium: Solid but wider career evidence. Treat close ranks with extra care. Peak-form band: ±201 Elo. |
| Division and active years | Light Flyweight, 1980-1991 |
| Career record | 38-4-0 |
| Rating evolution | 1980: 1,745; 1981: 1,776; 1982: 1,792; 1983: 1,821; 1984: 1,834; 1985: 1,838; 1986: 1,834; 1987: 1,815; 1988: 1,792; 1989: 1,756; 1990: 1,728; 1991: 1,715 |
Rating summary - All-Time Index card - v1.2.3
Jung Koo Chang
An H&G All-Time Index v1.2.3 summary card for rank context, career context and comparison. Read close ranks with the Data Confidence label beside them.
Rank and score#203Ranked in the H&G All-Time Index v1.2.3 top 1000
H&G All-Time Index80.250-100 ranking index. This is the number that orders the list.
Peak-form Elo rating1,838Best-point rating on a separate scale, not directly comparable with the index. Posterior band ±201. 1985-04-01
Data ConfidenceMediumSolid but wider career evidence. Treat close ranks with extra care. Peak-form band: ±201 Elo.
Active years1980-19911980-1999
Primary divisionLight FlyweightTop 26% in division
Era percentileTop 16%Top 20% overall public pool
Strength of scheduleSolid schedule1,908 schedule score
Career W-L-D38-4-0Professional record summary
Versioned card
H&G All-Time Index v1.2.3
For context or disputes, use the methodology, versions and corrections pages.