FAQ

Q: What is the difference between difficulty score and complexity?
A: The difficulty score measure the amount of effort needed to solve the whole puzzle. Complexity measure the maximum number of combinations you need to consider when you solve the puzzle. In another words, you will take more time to solve a puzzle with high difficulty score, and you will need to use the helper more for puzzles with high complexity.
Q: But why can I solve one with high difficulty score easily sometimes?
A: The difficulty score is estimated by using one set of hint at a time. We can always do better if we use hints from multiple rows or columns.
Q: How do I save my progress?
A: Your progress is automatically saved when you play, except the history.
Q: How do I record which puzzle I have solved?
A: Please make use of Facebook like or Google +1 buttons to record it. We decided not to store any personal information of our players.