[Mathematical logic (miscellaneous).]

Master of Sports Sedyov, Candidate Master Chernov, and First-Class Ryzhov met at the club before training. -- Notice, - remarked the black-haired man, - one of us is gray, another is red-haired, and the third is black-haired. But none of us has hair color that matches our surname. Isn't that funny? - You're right, 一 confirmed the Master of Sports. What color is the hair of the Candidate Master?
Recall problems $71,132,144$.

## Solution

The black-haired man was not the master (since the master confirmed his words). This means that the black-haired man is Ryzhov. Sedyov can only be red-haired, and the master candidate Chernov is gray-haired.

## Answer

Gray.