Pac-Man Grouping Strategy II - Max Score Thru 9th Key

A more efficient example of my grouping strategy for the original Pac-Man arcade game. Grouping (a.k.a., freestyle) play involves using the enemy pathfinding logic to the player's advantage, causing all four ghosts to converge and move as a single unit through the maze. Once together, the ghost group is lured to an energizer where all four are eaten for maximum score. This strategy is used on all boards where ghosts are edible (1-16 and 18). Patterns designed to quickly clear maze are used for the remaining boards. One pattern is used for boards 17, 19, and 20. Starting at board 21 (a.k.a., the 9th key), a different pattern is used that works until board 255, at which point the game displays a half-corrupted maze due to a programming glitch and you cannot progress further.