Have you ever heard about the Einstein's riddle? Enjoy one of the simplest and most challenging thinking games around! This little logic game will require a little more than logical thinking and patience to complete it.

According to rumors the great theoretical physicist Albert Einstein would have created this puzzle when he was a child and according to estimates at the time only 2% of the world's population would be able to solve it. Are you in this select group of people?

There are over 400 uniquely structured levels which have a very light difficulty curve. So you can play every day and train your brain relational perception and reflexes.

In the first levels all you need to do is solve the puzzle but will you be able to solve them faster and faster and without any errors? Find out if you are capable by advancing to the last levels!

Challenge yourself now! Test your IQ and your friends' IQ too!

• Play for free;
• Save thinking progress whenever you want;
• Erase everything and start over if necessary;
• Score as much as you can and break records;
• Discover the answer to the riddles;
• Share with your friends!