Discover the International Logic Olympiad: A Global Challenge for Curious Minds

What makes an argument convincing? How can you tell whether two statements contradict each other? And when a puzzle offers several possible answers, how do you prove which one must be correct?

These questions lie at the heart of the International Logic Olympiad (ILO)—a competition that invites students to explore logical reasoning and put their problem-solving skills to the test.

What Is the International Logic Olympiad?

The ILO began in 2024 as a partnership between Stanford University and Luminas, a US non-profit organisation. It was created to promote logic education and give students an international opportunity to demonstrate their reasoning abilities.

The competition progresses from a preliminary round to an on-campus final at Stanford University, bringing students together through a shared interest in logic and problem-solving.

What Does the ILO Test?

Logic is about understanding what follows from the information you have.

If certain statements are true, what else must be true? Can a set of claims all hold at the same time? Does an argument establish its conclusion, or does it leave something unproven?

Stanford’s description of the ILO identifies several areas of assessment, including logical consistency and entailment, logic grids, proofs, and applications of reasoning in puzzles, games, and real-life problems. The ILO website also highlights sets and set operations, such as union, intersection, and complement, alongside symbolic mathematics at a high-school algebra level.

Students therefore have an opportunity to connect abstract ideas with practical challenges: identifying constraints, checking possibilities, and reaching conclusions supported by evidence.

Try a Simple Logic Challenge

Consider this original example:

Three students—Alex, Bella, and Chris—each choose a different activity: chess, coding, or debating.

• Alex does not choose chess.

• Bella chooses neither chess nor debating.

Who chooses each activity?

Bella must choose coding. That leaves chess and debating for Alex and Chris. Since Alex does not choose chess, Alex must choose debating, and Chris must choose chess.

This is a simple illustration rather than an official ILO question, but it demonstrates a useful habit: each conclusion follows from a stated condition. As problems become more complex, keeping track of those conditions becomes increasingly important.

Who Might Enjoy the ILO?

The ILO may appeal to students who enjoy mathematics, computer science, strategy games, debating, or puzzles.

You might enjoy exploring logic if you like asking:

• Why must this answer be correct?

• Is there another possibility?

• What assumption does this argument rely on?

• Can I find an example that disproves this claim?

An interest in these questions is a useful starting point. Preparation then helps students become familiar with formal concepts and practise applying them accurately.

Junior and Senior Opportunities

The ILO offers Junior and Senior competitions.

The current Junior information describes a competition for students aged 11–14 in US Grades 6–8, with beginners welcome. The 2027 Senior registration page specifies high-school students in US Grades 9–12, aged 14–18 by 1 January 2027, who can understand, communicate, and complete exams in English. Students should check the official division requirements before registering.

For students outside the United States, it is important to check how the published grade requirements apply to their own school system.

What Does the Competition Pathway Look Like?

The published 2027 Senior structure begins with a Preliminary Round, followed by an in-person Final Round at Stanford University.

The preliminary examination is held at regional partner locations. Where no regional partner is available, the Senior competition provides an online examination option through its testing portal. Finalists are selected according to their performance relative to the relevant participant pool.

Students and families should consult the official information for their division when planning participation, including testing arrangements and requirements for attending the final.

How Can Students Start Preparing?

When practising, focus on the reasoning behind your answer:

State the conditions clearly. Separate what the question tells you from what you are assuming.

Work systematically. Use a table, diagram, or list to organise possibilities.

Check your conclusion. Make sure it satisfies every condition.

Explain each step. Ask whether someone else could follow your reasoning and reach the same result.

These habits make practice more useful than simply checking whether an answer is right.

A New Challenge for Curious Minds

For students who enjoy asking “why”, spotting patterns, and working through puzzles, the International Logic Olympiad offers an opportunity to explore how logical thinking can turn unfamiliar problems into clear, well-supported solutions. For parents, it introduces a competition centred on skills that matter across many subjects: careful analysis, independent thinking, and the ability to explain an answer.

This introduction is a first look at the ILO and what it may offer students in New Zealand. Pinnacle Exam Centre will share further information about participation opportunities, preparation, and next steps as details are confirmed.

Interested in exploring the ILO? Stay tuned to Pinnacle’s website and social media for future announcements.