APR 22–24, 2026

EPIO & Challenge announcement

Officially announced at the closing of the V EPIO (Spring School on Operations Research). Call for participation, rules, and problem description published. Team registration opens.

MAY – JUN 2026

Preparation period

Teams form and register. Continued dissemination through SMIO and Hexaly channels. Development of the instance generator, solution verifier, and web platform.

JUN 2026

Instance generator released

Open-source Python code released so teams can create additional test instances and develop their methods. A set of mock instances with feasible solutions and the verifier code are also published. Official competition instances are not published at this stage.

JUN – JUL 2026

Final preparation

Generation of official instances (internal). Hexaly runs its solver to produce the baseline solutions. Platform testing and final checks.

MID-JUL 2026

Competition launch

Official instances and Hexaly baseline solutions published. Solution submission opens. The leaderboard goes live.

MID-JUL – EARLY AUG

Competition window · ~3 weeks

Teams submit solutions through the platform. The leaderboard tracks the best participant solutions in real time. Lead-time scoring rewards finding good solutions early and holding them.

EARLY AUG 2026

Competition close

No more submissions accepted. Final verification of all solutions begins.

AUG 2026

Results & coordination

Results analysis and winner determination. Contact with winning teams to coordinate presentations and travel logistics for CSMIO.

SEP 2026

Conference preparation

Preparation of the Challenge session for the CSMIO program. Results dissemination materials.

OCT 7–9, 2026

CSMIO 2026 · Monterrey

Challenge results presentation session. Hexaly workshop. Award ceremony. Winners present their approaches to the community.

POST-CONFERENCE

Permanent benchmark

Publication of all results, instances, and solutions as a permanent benchmark for the research community.

NOTE

Dates are tentative

Exact competition launch and close dates will be confirmed once the instance generator is finalized. Follow SMIO's channels for official updates.