This achievement requires you to beat the Expert computer opponent in Battle mode.
This is the hardest achievement in this game, it requires lots of luck and skill as the Expert computer rarely ever makes a move that doesn't result in a combo. Some tips on this difficulty are:
1. You are able to pause the game which can help you study the screen to find crazy combos you can create, although the pause menu screen may be in the way, it is a very useful method. You can even unpause and pause to take a quick look.
2. Create as many starflowers and emeralds as these are better than normal combinations and are able to be used in a situation where the Expert computer has locked a part of your board.
3. If you are behind a lot, you are able to create chains that give more than normal combos and they boost up your meter, although do not use all of your starflowers and emeralds as these are essential when a part of your board is locked up
4. Use attacks smartly, do not use bombs as the Expert computer will defuse them quite quickly and which will result in the bomb moving over to your board. Use the collapse only when you really need it. The best attacks are moving the board to create more space for you and less for the Expert computer and locking the Expert computer's pieces. The more of those two attacks you use, the more likely you are to win the game
5. Don't give up and keep trying as it is tough and unless you are a master at Hexic, you will not do it first try, it will take you a lot of tries, but as you try and try you will get better and better until you can overcome the Expert computer.
Video Guide:
Credit to KnightNova J