Separate legal moves from a good strategy
Repair move rules, produce legal game decisions, and evaluate improvements using repeatable evidence.
What you will practice
- Preserve the game state after invalid actions.
- Distinguish immediate legality from future value.
- Compare strategies under the same documented workload.
Continue the guided path with Pro
Get this lesson, its focused drills and review guidance, plus explanations, replay, and unlimited native grading. AI usage has a separate allowance.
Sources and scope
The cited employer material supports the preparation format and skills, not these exact tasks, APIs, tests, or timings. Existing nrml exercises retain their own provenance. Reading times and rehearsal budgets are nrml suggestions. Completion records practice and review, not hiring readiness.
- Meta hiring FAQ · practical-format context, not attribution of this exerciseReviewed 2026-10-28