PQ2 helps players calculate their intelligence by using the PQ scoring system based on the number of moves and the speed with which they complete more than 250 puzzles. PQ2 players use the PSP system's infrastructure mode to take their score online to measure their brain power against their friends, their country and even their gender. PQ2 uses a measuring system that was created under the guidance of Professor Masuo Koyasu of Kyoto University in Japan that determines players' "Practical Intelligence Quotient" or PQ. Players create their own puzzles and share with friends utilizing the PSP system's gamesharing mode or utilize infrastructure mode to upload puzzles and download new ones. PQ2 allows players the flexibility to choose which puzzles they want to play first and the ability to get a preliminary PQ score in roughly 10 minutes or play through the full puzzle set, including 10 unlockable puzzles, for their full PQ score.