H&G All-Time Index public fighter card
Jung Koo Chang
Light Flyweight · South Korea
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.
- All-time rank
- #203
- H&G All-Time Index
- 80.250-100 ranking index. This is the number that orders the list.
- Career record
- 38-4-0Professional wins, losses and draws.
- Active years
- 1980-1991
- Data Confidence
- MediumSolid but wider career evidence. Treat close ranks with extra care.
Career story
How Jung Koo Chang's rating rose and fell year by year, with his peak marked.
Yearly peak-form Elo rating points. This curve is separate from the 0-100 ranking index.
Show the year-by-year numbers
| Year | Peak-form Elo rating |
|---|---|
| 1980 | 1,746 |
| 1981 | 1,775 |
| 1982 | 1,790 |
| 1983 | 1,819 |
| 1984 | 1,830 |
| 1985 | 1,836 |
| 1986 | 1,833 |
| 1987 | 1,815 |
| 1988 | 1,793 |
| 1989 | 1,757 |
| 1990 | 1,729 |
| 1991 | 1,717 |
Why this ranking
Jung Koo Chang ranks #203 with a 80.25 score on the 60-100 H&G All-Time Index. His standout win in our data is over Sot Chitalada in 1984, who reached a 1,777 Peak-form Elo, one of the stronger opponents on his record. In one case a result was later reversed: he beat Sot Chitalada once, then lost to him in a later fight. Data Confidence is Medium, so the rating should be read with wider uncertainty. Peak-form Elo is 1,835 (±202), separate from the 60-100 career Index.
What lifts or lowers this ranking
Bars show each weighted signal's relative size. Gold lifts the placement; grey holds it back.
How much the record is helped by wins over contemporaneous title-level opponents.
How much major title evidence supports the rating.
Same-era separation left after the shared peak and sustained rating signal is removed.
How much repeat elite-year presence supports the all-time case.
A narrow signal for lineal, explicit undisputed or major multi-belt class control in this release data; it is not a full title history.
Collapsed signal from peak rating, sustained rating and same-era separation.
Compare and explore
Put Jung Koo Chang next to any other ranked fighter, or open the tools built on the same rating data.
Top fights
The highest-ranked fighters Jung Koo Chang actually faced, biggest names first. Each one opens the head-to-head tool with the pair filled in.
- Humberto Gonzalez#184 · Index 81 · 1989
- Sot Chitalada#493 · Index 75 · 1984, 1990
- Hilario Zapata#615 · Index 74 · 1982, 1983
- Muangchai Kittikasem#651 · Index 74 · 1991
Ranked-vs-ranked bouts from the pinned fight archive, ordered by opponent ranking. An objective record of who they shared a ring with.
Great rivals he never fought
Ranked fighters who shared a recognised division and whose competitive careers overlapped, with no bout between them on record. Each name opens the head-to-head tool with the pair filled in.
- Ricardo Lopez#68 · Light Flyweight · 7 overlapping years (1985-1991)
- Ruben Olivares#176 · Flyweight · 9 overlapping years (1980-1988)
- Jacob Matlala#538 · Light Flyweight / Flyweight · 12 overlapping years (1980-1991)
- Nana Yaw Konadu#757 · Flyweight · 7 overlapping years (1985-1991)
- Carlos Salazar#780 · Flyweight · 7 overlapping years (1985-1991)
- Santos Laciar#790 · Flyweight · 11 overlapping years (1980-1990)
Show 2 more
- Myung Woo Yuh#944 · Light Flyweight · 10 overlapping years (1982-1991)
- Duke McKenzie#991 · Flyweight · 10 overlapping years (1982-1991)
Shared recognised division, overlapping competitive years, no recorded bout between them. A measured pattern only.
Linked style profile
8-axis style breakdown
Jung Koo Chang also has a reviewed style profile with radar scores, study notes and diagnostic comparisons.
About this rating
Rankings: H&G All-Time Index v2.0.0. Reflects fights up to , the most recent on record. The ratings are fixed to that point, so fights after it are not yet included.
The rating itself is built from the 28 bouts we hold full data for from 1980 to 1991, which is why this count differs from the professional record above.
For the data-minded
Peak-form Elo rating: 1,835 (peak dated 1985-08-01). This best-point rating sits on its own scale and is not directly comparable with the 0-100 index.
The peak estimate carries an uncertainty band of about ±202 Elo, so read close comparisons with care.