Zuisei 瑞星, the 'lucky star', is the quiet DIRECT opening: black's third slides into the same line as the first two stones, one empty point from the centre on the side AWAY from white. Black builds thickness rather than a running attack, and theory holds the position steady. But a line with a hole has its own danger: black's two stones are a jump pair, and if they ever link up the row wakes up. You are WHITE, choosing the fourth. Take the solid point — the one that keeps black's pair apart forever.
Solve the remaining tasks to finish this lesson.