The opening is theoretically the hardest part of the game of go. To professional players, it is the hardest part in practice, as well; in championship games that last two days, for instance, the first day is usually spent playing and thinking about the first 50 moves, and the second day is spent finishing all the rest. Such is the consistency of professional play in the middle game and endgame that if a player comes out of the opening with a bad position, it is almost impossible for him to catch up. Amateurs sometimes rush through their initial moves, saving their powers for the fighting...