Welcome to the intermediate level of "Solving Logic Problems." If you've already finished all the puzzles in the beginning level and made it this far, you might want to continue to the following sections to sharpen your skill. If you haven't finished them already, you might want to go back and finish them. The problems you will encounter in this level will probably be harder for you to solve, and you may as well go back to finish anything that you haven't done since then. The skills you've learned in the previous section will likely help you to conquer them.