9×9 is an interactive device that assists users in solving Sudoku puzzles by providing real-time hints and feedback, guiding them through the process to enhance learning and improve. The system features an overhead camera that scans a physical Sudoku board with computer vision, and then a Sudoku-solving algorithm will then determine possible solutions. From then on, users can request hints for specific cells or check their completed board for correctness. All information is displayed through both a projector, which overlays hints onto the physical board, and an LCD screen displaying the puzzle. Our system utilizes a Raspberry Pi to manage the algorithm and user interactions, and FPGA to handle hardware acceleration and preprocessing. Users interact with the system with buttons in order to navigate the game and request assistance along the way. Overall, 9×9 merges physical gameplay with digitally assisted aid, making Sudoku more interactive and accessible.
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