Chess board

One chess board capable of recording time and chess manual automatically is realized by designing chess board as one keyboard with key array and by scanning the key array with all the horizontal lines being set in high level and the vertical lines being set in low level successively. At the intersects are sensors, which sense the change in horizontal line level during the motion of chess piece for recognition of microprocessor. The microprocessor circuit recognizes chess pieces and record time of both parties, and one computer connected via communication circuit records chess manual.