Challenge Library
Coding Challenges
5,893 curated questions across every arena — browse by topic, then jump into a live 3-minute battle to put them to the test.
Filter by type
Filter by difficulty
Popular topics
7 challenges matching your filters
Clear topic filter- Multiple ChoiceBeginner
Strategy vs if/else
architecturedesign-patternsstrategy - Multiple ChoiceIntermediate
Strategy vs Template Method
strategytemplate-methodcomposition - Multiple ChoiceBeginner
Strategy vs state vs policy
strategystatepatterns - Multiple ChoiceBeginner
Template method vs strategy
template-methodstrategypatterns - Multiple ChoiceIntermediate
Strategy vs State
architecturedesign-patternsstrategystate - Code AnalysisIntermediate
Template method wrong fit
template-methodstrategycode-analysis - Code AnalysisIntermediate
Strategy vs state selection
statestrategycode-analysis
Practice now, dominate the arena
Every challenge here is drawn from the live Code Royale pool. Review a question, then head to the arena to answer under pressure against a real opponent — 3-minute matches, Elo ranking, and badge tiers on the line.