Dr. Chen is a research scientist. He has held research positions at Navy and UCLA previously. His favorite pastimes are mathematics, puzzles, and game designs. He often revises game rules and ways to play to maximize the fun for his friends, such as one-club golf and jumbo three-cushion billiard. He believe that soccer would be a great game and sport, if the the final shootout are 20 yards kicks instead of 12. He is very interested in making games he has played more enjoyable for average players rather than only top players. Frustrated with the single difficulty level Sudoku grids printed by n...