Warmup

The warmup challenges are intended to get you familiar with the way Capture the Ether works and the tools you need to use.

• Deploy a contract 50 points
• Call me 100 points
• Choose a nickname 200 points

Lotteries

Feeling lucky? These challenges will show how hard it is to run a fair lottery.

• Guess the number 200 points
• Guess the secret number 300 points
• Guess the random number 300 points
• Guess the new number 400 points
• Predict the future 500 points
• Predict the block hash 750 points

Math

These challenges use a variety of techniques, but they all involve a bit of math.

• Token sale 500 points
• Token whale 500 points
• Retirement fund 500 points
• Mapping 750 points
• Donation 750 points
• Fifty years 2000 points

Accounts

These challenges test your understanding of Ethereum accounts.

• Fuzzy identity 500 points
• Public Key 750 points
• Account Takeover 1500 points

Miscellaneous

These challenges defy categorization.

• Assume ownership 300 points
• Token bank 750 points