Hunter X Hunter 2011 Episode 101 -

Killua’s victory is one of the most celebrated strategic moments in the series. Relying on his childhood training—where he mastered darts by the age of six—he deduces the exact rules of the "501" game being played.

When the brother throws a dart on a real board at their base, a "dart fish" materializes only at the moment of impact on Killua's corresponding body part. Hunter X Hunter 2011 Episode 101

Knowing the final dart must hit a double to "out," he anticipates the target: his forehead. Killua’s victory is one of the most celebrated

Despite his win, the victory is bittersweet. The blood loss is so extreme that Killua collapses, nearing death in the dark caves. His final thoughts drift toward Gon, apologizing for not being able to continue. Hunter X Hunter 2011 Episode 101