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Introduction: How to attack.  
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Attacking usually occurs in the middle game, but there are many
occasions where attacking opportunities arise in the opening,
especially in handicap games. This is because a player who has
a handicap starts with an advantage so that he can quickly establish
strong and secure positions. And strong positions are the key
to successful attacks. Here is the fundamental principle of attacking:

[Continued as "Problem 2"] 
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