
EVM Gas Puzzles
FreeWeb3 Security Competitions
EVM Gas Puzzles provides practice gas optimization with real smart contracts.

Web3 Security Competitions
EVM Gas Puzzles provides practice gas optimization with real smart contracts.
EVM Gas Puzzles provides a structured set of challenges that help Ethereum engineers improve smart contract efficiency.
Each puzzle defines a gas target that is known to be achievable, yet the current implementation falls short of reaching it.
The goal is to analyze the contract, identify inefficiencies, and apply proven optimizations so the target gas usage is met.
Through iterative testing and thoughtful refactoring, you’ll gain practical experience optimizing on-chain logic, evaluating different approaches, and validating gas costs across a variety of scenarios.