A series of SQL Injection challenges

I want to introduce 3 SQL Injection challenges I originally created for the GuadalajaraCON CTF. After the conference had come to a close, I decided to open these challenges to the public via twitter and sla.ckers. Almost 2 months later, most challenges have yet to be solved, so I figured it was time to make an official post. Additionally, to make the challenges easier and more appealing to everyone, I went ahead and translated them to English.

Each challenge has 2 parts, A and B. The second part, B, is a modified version of A and is a bit harder. If you think you have what it takes, you can access the challenges at:

http://50.57.51.240/challenges/ (challenge is no longer available online)

Please submit your solutions to [email protected], including the SQL Injection used to solve the challenge. Only solutions which use SQL Injection will be accepted.

I hope you enjoy solving them!