Quidditch Match Day Incident (II)

"Everyone, pay attention. If Gryffindor's Beaters could keep the Bludger controlled in the midfield, Slytherin's Chasers would be forced onto the defensive. But the problem was that Slytherin's Keeper was seventh-year Bletchley, whose saving range covered the entire goal-hoop area. Gryffindor's Chasers had to work together, using angles and speed to create blind spots."

She tapped the analysis diagram with the wand in her hand, and the points of light swiftly shifted formation.

Gryffindor's three Chasers advanced toward Slytherin's hoops in a triangular formation, while the point of light representing Slytherin's Keeper moved rapidly to block the first shooting angle.

"Look, if Angelina shoots from here, Bletchley has an eighty percent chance of saving it. But if she passes to Alicia first, and Alicia then passes to Katie, with Katie cutting in from the flank—" She tapped again, and the points of light moved once more. This time, Slytherin's Keeper was half a beat too slow. "Then the chance of scoring rises to around sixty percent."

"Also, roughly seventy percent of Gryffindor's attacks are concentrated on the left wing, while Slytherin's right-side defense is very strong. Their Beaters are positioned far forward. That could be a trap."

She did not speak loudly, but the canopy gathered her voice, allowing everyone nearby to hear her clearly.

A fifth-year boy sat beside her, holding a brass instrument covered in markings as he measured the wind speed and rainfall. He muttered, "Southeasterly wind, twelve feet per second, moderate to heavy rain... Weather like this affects the Bludger's flight trajectory by around seven percent..."

He was not loud either, but several people around him listened intently, occasionally nodding or frowning.

The older girl rolled her eyes. "Seven percent? You forgot to factor in how humidity affects the friction on broom bristles. I calculated it—it's