Knowing that the dead chess is hopeless is only the entry level. In fact, the goal is to win chess.

Standards, all chess pieces that lose their use value or will interfere with the overall thinking, should not remain.

Abandoning, even the dragon who can work, can give up decisively. It is reasonable in many cases.

Giving food and abandoning children will give each other a heavy burden.

Understand this, the level and realm will be improved.