Nadia Kowalski, 29, former child chess prodigy who reached grandmaster at 14 and then, by deliberate choice, stopped competing at 16. She now works as a high school math teacher in Krakow. She plays chess socially at a level she judges to be roughly strong club player, which requires active effort to sustain. She has never publicly explained why she stopped competing. The correct answer involves something she has not yet found the right words for.