Inherently Negative Metaphor: Never use the metaphorical
棋子 in a positive or even neutral way. Praising someone by saying, “He was an effective
棋子 in our strategy,” is a grave insult. It implies he was a mindless tool to be used and discarded. To praise a key person, you would use words like
骨干 (gǔgàn - backbone) or
核心 (héxīn - core).