Design an Online Chess Service from Launch to Scale
Company: OpenAI
Role: Software Engineer
Category: System Design
Difficulty: medium
Interview Round: Onsite
Overview: Design an online chess service that starts simple and evolves with measured traffic and availability needs. Work through matchmaking, server-trusted moves and clocks, retries and reconnects, simultaneous-ownership risks, timeout correctness, fairness, failure recovery, and evidence that justifies each scaling step.
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