- Problems in the archive
- 112
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100 catalog entries (including 5 imported) + 12 quick-practice problems
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Modern
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The olympiad library
40 IPhO · 35 APhO · 25 EuPhO. Complete statements and diagrams imported across six topics, from 2004 to 2025. Solution completeness and English translation progress are tracked separately.
100 statements imported · solution review required
Topic coverage & source audit
Each problem counts under one editorial primary topic. Concept tags remain searchable. Actual coverage is shown against the proposed targets, not disguised as a completed quota.
| Primary topic | IPhO | APhO | EuPhO | Actual / target |
|---|---|---|---|---|
| Mechanics | 9 | 7 | 4 | 20 / 20 |
| Electromagnetism | 9 | 5 | 6 | 20 / 20 |
| Waves | 5 | 7 | 3 | 15 / 15 |
| Thermodynamics | 7 | 3 | 5 | 15 / 15 |
| Optics | 4 | 6 | 5 | 15 / 15 |
| Modern physics | 6 | 7 | 2 | 15 / 15 |
Original PDF layouts are preserved, including shared year papers where needed. Every imported problem includes selectable source text and locally stored figures. Russian mirror imports are labeled; pho.rs is a source host, not a fourth competition. The original five pilot problems also retain their structured subpart guides.
Full theory problems
- IPhO 2025 · T1Imported
Hydrogen and galaxies
Modern physicsBohr modelHydrogen spectrumDark matterEnglish source · local PDFs & diagrams · Unrated
- APhO 2024 · T3Imported
The first quasar: the secrets of 3C 273
Modern physicsQuasarsRedshiftLunar occultationRussian source · English translation pending · local text & diagrams · Unrated
- EuPhO 2024 · T2Imported
Spaceships
Modern physicsSpecial relativityVelocity additionLorentz transformationsEnglish source · local PDFs & diagrams · Unrated
- IPhO 2024 · T3Imported
The black widow pulsar
Modern physicsBinary systemsPulsarsOrbital dynamicsRussian source · English translation pending · local text & diagrams · Unrated
- IPhO 2023 · T2Imported
Neutron stars
Modern physicsNuclear binding energyNuclear stabilityNeutron starsRussian source · English translation pending · local text & diagrams · Unrated
- APhO 2022 · T1Imported
The Stern–Gerlach experiment
Modern physicsSpinMagnetic momentsAtomic beamsRussian source · English translation pending · local text & diagrams · Unrated
- APhO 2019 · T2Imported
X-ray jets of active galactic nuclei
Modern physicsSynchrotron radiationRelativistic jetsMagnetic forcesRussian source · English translation pending · local text & diagrams · Unrated
- EuPhO 2018 · T3Imported
Staircase
Modern physicsCrystal surfacesSurface energyScaling lawsEnglish source · local PDFs & diagrams · Unrated
- IPhO 2018 · T2Imported
Where are the neutrinos?
Modern physicsParticle physicsMomentum conservationRelativistic kinematicsEnglish source · local PDFs & diagrams · Unrated
- APhO 2017 · T1Imported
Vortices in a superfluid
Modern physicsSuperfluidityQuantized circulationVorticesRussian source · English translation pending · local text & diagrams · Unrated
The import pilot
IPhO 2011, 2015 & 2025. Original statements and solutions, with a structured subpart index. Five full problems, not a collection of isolated answer fragments.
Source-fidelity pilot · review pending
Official-source theory problems
58 scored subparts across the batch. Grouped requests such as 2011 task 1.2 retain their nested questions; subparts are not counted as separate archive problems.
Portable JSON includes provenance, attribution, native reading notes, subpart mappings, local PDF/image paths, review status, and SHA-256 checksums. Files stay in the project; no database or background importer is connected.