Spybot: Search & Destroy (included game)

This malware-removal tool contains a simple easter egg game. Clicking on the binoculars icon just beneath the main toolbar (adjacent to the program's title) will activate the game, a simulation of the Traveling Knight Problem, a puzzle challenging would-be solvers to move a chess knight located in the corner to every square of a chessboard once and only once, using the knight's characteristic L-shaped movement pattern. In this implementation of the problem, every square visited will reveal one grid cell of Leonardo da Vinci's anatomical drawing Vitruvian Man.

The goal is to visit every cell and reveal the complete drawing, though poor movement decisions can result in dead-ends terminating the game prematurely.