About the tournament

The tournament is composed of four selective Science Fights (SF), one Semi-Final SF, and the Finals. Throughout four selective SFs, each Team meets other contestants, and no Team is eliminated. These competition rounds are played in parallel all-play-all Groups. The Teams are rotated after each SF to ensure as far as possible that no two Teams meet more than once. Selective SF1 and SF2 are focused on main IYNT problems known to the Teams in advance. Selective SF3 is focused on problems Invent Yourself with the original problem statements by each Team. Selective SF4 is focused on additional problems that the Teams are given immediately before the Fight to solve during a 45' preparation phase.

Overview of a Science Fight

Discussion of the IYNT problems during our events has a form of scientific discussions called Science Fights or SF, shortly. A Science Fight resembles a scientific seminar or a graduate thesis defense. In a Science Fight, the Teams switch their roles and take to the floor as Reporters, Opponents, and Reviewers. Their performance is then graded by professional jury of research scientists and educators.

Roles In A Fight


Three Teams of six members each are seated in a Fight Room before a panel of jurors.
The Team of Opponents challenges the Team of Reporters on one of the IYNT problems.
If the challenge is accepted by the Reporters, one Team member takes to the floor and presents their solution in an 8 minutes talk.

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The Team of Opponents poses clarifying questions to the Reporter and briefly prepares.
A Team member of the Opposing Team takes the stage, criticizes the Report, and draws attention to possible shortcomings and errors in the understanding of the problem and in the solution.
This leads to a discussion between the Reporter and the Opponent in which the Reporter defends their results.

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The Team of Reviewers assesses the outcome of the debate and draws impartial conclusions.

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The Jurors hold up their scores and the Chairperson concludes the first Stage which lasts around 50 minutes.
After a short break, second and third Stages continue, and all Teams switch their roles.

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The problems for the 10th IYNT 2022 are presented below.

Main Problems for Science Fight 1
1. Chocolate and speed of light A visual method to measure the speed of light is to place a chocolate bar in a microwave oven until chocolate starts to melt and measure the distance between hotspots. Study this effect and investigate the accuracy of the method.
2. Rotary phones If volunteers of different age groups are challenged to dial a number on a rotary phone, it may turn out that some age groups are unfamiliar with the old technology. Obtain statistical data in controlled conditions and discuss the results.
3. Matches on fire When the outermost match in a regular array of matches is lit, the following matches ignite one by one. Investigate the parameters that determine the speed for such a fire wave.
4. Microscopic swimmers Investigate experimentally and theoretically the locomotion of bacterial or eukaryotic cells that use natural flagella to move in a liquid.
5. Frosty patterns Patterns similar to frost on a winter window are obtained if magnesium sulphate in solution is deposited on a glass surface. Investigate this effect.
6. Ship wakes The wave pattern produced by a ship moving on the water is visually similar to a Mach cone and depends on various parameters. Investigate the effect.

Main Problems for Science Fight 2
7. Clicking fingers Snapping one's fingers results in a loud popping sound. Investigate the nature and properties of this sound.
8. Seeing through pinholes An opaque sheet with regularly arranged pinholes corrects myopia similar to corrective lenses. Explain this effect and introduce parameters to describe image perception by myopic humans with and without pinhole glasses.
9. Parosmia Misperception of existing odors is a common post-COVID side effect that may persist for months. Collect data to study and characterize this dysfunction.
10. Rubber bands heat engine All the spokes in a bicycle wheel are replaced by rubber bands. If the rubber bands on one side of the wheel are heated, the wheel starts to rotate. Investigate this effect.
11. Resistant plants Some plants are tolerant of freezes but others can hardly survive low temperatures. Perform experiments to investigate what plants can survive freezing temperatures.
12. Colored fire It is easy to colorize a flame using various chemicals. Identify the chemicals needed to get a specific color and investigate what color is obtained if a mix of two chemicals is used.

Problems Invent Yourself for Science Fight 3
13. Invent Yourself: Naming colors A Munsell color chart can be used to survey volunteers about their perception of different colors. Suggest a problem related to color naming by humans and investigate the factors that influence how individuals categorize visible colors.
14. Invent Yourself: Wave optics Formulate an open, though-provoking problem that concerns a phenomenon of wave optics.
15. Invent Yourself: Biological clock Examples of timing processes in living organisms are plants opening their flowers at particular times of the day or sleep-wake cycles in humans. Propose a problem concerning rhythms and timing in the species of your choice.
16. Invent Yourself: Flying seeds It is interesting to observe how maple seeds spin when falling to the ground, or how dandelion seeds fly away with the wind. Propose a problem about the flight of the seeds from a plant of your choice.
17. Invent Yourself: Principle of least effort Propose an interesting experimental test of how a complex natural system chooses the path of least resistance in particular settings or situations.

Get Involved

If you are interested in participating, please fill the form and we will contact you.

Registration begins in August of each year after the problems are published. Students all over Greece can register and start working on the problems.
It is not necessary that a team consists of students from the same school.
Students must be at the proper age, from 12 to 16 years old (High school students), both from private and public schools.
Hellenic Physical Society (EEF) is responsible for organizing the students in teams and help them through the problems.
Students of a different nationality that study in schools (private or public) in Greece have also the right to participate.

Latest News


9th IYNT 2021 Results

  • 2 Bronze Medals for Greek Teams!
  • team Fryganiotis
  • team Alliance (Anatolia, Raptou, Hellenic College)

8th IYNT 2020 Results

  • 3 Bronze Medals for Greek Teams!
  • team Fryganiotis
  • team Anatolia College
  • team Pinewood

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