Hmm, these "mind bender" puzzles you're talking about sound like logic problems to me, Zak...where you have to use a dot to represent a "yes" on the grid, and X's to represent "no" on the grid, according to the clues (as well as additional facts that you can deduce by combining the information from two or more clues)...I've done those before myself, solving some successfully while getting stuck with other ones, the real troublesome ones in this category (for me, anyway), are the table puzzles, where the information has to be entered into a table, not using dots or X's at all...they can be quite hard.