Yes, that map (maze_04p_02) is bad, and I assume it won't be used in the final competition. It's the cell_mazes we should be looking at.
However, that game as well as many other of xathis' cell_maze games does illustrate that xathis' bot is much more aggressive than it used to be. The issue addressed as point #2 in Memetix' first post about having 'break-through' code when you have a large enough army seems to be a major component of this top bot. The only thing is, xathis attempts to break through even when he has a small army. Even when he has a smaller army than his opponent. Sometimes he gets pushed back after losses. Yet, he wins, and wins, and wins.
This isn't the best example, but it kinda shows what I'm talking about : http://aichallenge.org/visualizer.php?game=212112
At move 428, xathis manages to take the ant hill with 3 ants, even though pguillory was there first and has five ants. Also, at move 577 at the fight at row 58 col 156. If you'll watch up to the end of the game, you'll see xathis is sacrificing even with a smaller army. These situations between pguillory and xathis *used* to be stalemates. Now, there is more aggressive code. The improvement has happened. I am satisfied.
aggressiveness + excellent line formation with ants = speed at taking enemy ant hills
PS congrats on results against xathis, Memetix