Yi Qiu (Chinese: 弈秋; pinyin: Yì Qiū; Wade–Giles: I Ch'iu) was a Chinese weiqi (go) grandmaster active during the early Warring States period, described as one of the best in his era. He was the first recorded weiqi player in history, having been mentioned in an anecdote from the ca. 300 BC text Mencius.