Documented path
Sydorenko was born in Zhdanov (now Mariupol), Ukrainian SSR, and trained at the Avangard Zhdanov club within the Soviet sports system. He became a Master of Sports of the USSR at 16, won bronze at the 1977 European Championships at 17, set a world record in the 200m IM at the 1978 Soviet Championships at 18, and was recognized as the best swimmer in the USSR in 1979. He won Olympic gold in the 400m IM at the 1980 Moscow Olympics at age 20.
Born in Zhdanov (now Mariupol), Ukrainian SSR, USSR; trained at the Avangard Zhdanov club within the Soviet state sports system. Family background not documented.
Died on February 20, 2022 at age 61 in Mariupol, Ukraine from COVID-19; had worked as a swimming coach and water polo team manager in Mariupol after retirement.
Where the conditions came from
Each is placed on a −1 to 3 scale from documented evidence, and the three are never added together. A combined total would rank Oleksandr Sydorenko against other people. Held apart, they explain why this path ran differently from another one—which is the only comparison this project supports.
The marble itself
+2Tailwind
What capability, drive, or early skill is documented in the person rather than their surroundings?
Achieved Master of Sports of the USSR at 16. Won European bronze at 17, set a world record in the 200m IM at 18, and won Olympic gold at 20. Named best swimmer in the USSR. Exceptional early swimming talent with rapid progression.
Where it was dropped
0Neither way
What money, family standing, network, or permission was already in place before the work began?
Born in Zhdanov (now Mariupol), Ukrainian SSR. No documented family background or swimming domain advantage.
The shape of the track
+2Tailwind
What place, timing, institution, or peer group made the next step available?
Soviet Union's elite state sports system, training at the Avangard Zhdanov club. The Soviet sports system provided elite training facilities, coaching, and systematic talent development. Early international competition from age 17. The state sports pipeline was the defining ecosystem.
A −1 is a documented headwind, not a missing value; a 0 means the sources record nothing notable either way. Annotation confidence: Medium. These are analyst readings of what the sources record, not measurements of merit, talent, or effort. The twenty-two scored dimensions remain available inside the deeper research detail.
What moved through the conditions
This records repeated behaviour or recovery described by sources; it is not a grit or merit score.
A successful-only archive cannot recover all encounters, avoided setbacks, or alternative outcomes.
Strongest documented signals: Elite institution pipeline, Direct domain exposure, Frontier geography.
Describes the starting position, not what the person later made of it.
Strongest observed levers: Domain proximity, Started serious reps before 20, Prior reps.
Measures what was present, not whether it was inherited, earned, self-built, external, or mixed.
The timeline below shows the sequence of work and transitions around the selected early milestone. It is evidence of a path, not proof that every step was necessary.
Dominant figure at the top of a field. The tier summarizes documented career recognition through the data cutoff—not Oleksandr Sydorenko's worth or future potential.
Question four · where did the leverage come from?
Each non-zero lever gets a best-supported origin, evidence signals, and confidence. Unresolved is the honest default when the biography cannot distinguish self-built, advantage-enabled, earned, external, or mixed.
One or more documented starting advantages plausibly enabled this lever.
One or more documented starting advantages plausibly enabled this lever.
One or more documented starting advantages plausibly enabled this lever.
One or more documented starting advantages plausibly enabled this lever.
One or more documented starting advantages plausibly enabled this lever.
One or more documented starting advantages plausibly enabled this lever.
A structural wave is external to the person, even when their position improved access to it.
This is a bounded inference from the current annotations—not a claim about private effort, merit, or the percentage of Oleksandr Sydorenko's outcome attributable to any origin.
Structural luck, Encounter luck, Event luck, Outcome variance can change every arrow in the path. This successful-only dataset cannot observe the near-identical paths that did not break through, so luck stays visible and unscored.
Multiplying capacity documented later in the path. Measures what was present, not whether it was inherited, earned, self-built, external, or mixed.
Access or conditions documented near the beginning of the path. Zero means "no clear evidence in reviewed sources," not "advantage was absent."
Born in Zhdanov (now Mariupol), Ukrainian SSR, USSR. Family background and financial status are not documented in reviewed sources.
Not documented in reviewed sources. No family swimming or athletic domain expertise is recorded.
Sydorenko was born in Zhdanov, Ukrainian SSR, and developed within the Soviet Union's elite state sports system, training at the Avangard Zhdanov club. He achieved Master of Sports status at 16, won European bronze at 17, set a world record in the 200m IM at 18, and was named best swimmer in the USSR at 19. At 20, he won Olympic gold in the 400m IM at the 1980 Moscow Olympics. No family domain expertise or financial advantage is documented; his trajectory was driven by the Soviet athletic pipeline and his own exceptional talent and early specialization.
advantage confidence: Medium · source count: 4 · audit: source_verified · status: subagent_researched_beta