He’d always told himself he wouldn’t. His professor, Dr. Vera, had warned the class on day one: “Looking up solutions is like copying the map of a labyrinth. You’ll find the exit, but you’ll learn nothing about the walls.”

Move 1: (0,0) Move 2: (1,2) ... Move 64: (7,5) Tour complete! Visited all squares. Leo leaned back. The ramen had gone cold. The coffee was bitter. But for a moment, the blinking cursor wasn’t an accusation—it was a salute.

In the description, he wrote:

“The Knight’s Tour,” he whispered, staring at the chessboard pattern he’d tried to code for four hours. His solution worked for the first five moves, then always ended with the knight trapped, two-thirds of the board untouched. The textbook’s appendix only gave answers for the even-numbered exercises. Of course, 7.24 was odd.

A repository called “Deitel-Solutions” appeared. The README said, "For educational reference only. Don't just copy. Understand."