Poker is a game where mathematical strategy and chance walk hand in hand. Even a perfectly played hand can sometimes end in defeat, while a win may come at a moment when the odds were minimal. This is the manifestation of variance — the deviation of actual results from what you expect over the long run. Understanding variance helps to avoid tilt, maintain motivation, and make clear-headed decisions. In this article, we will explain in simple terms what variance and downswings are, why they happen even to professional players, and what to do so that a streak of bad luck doesn't throw you off course.