Bejeweled 3

In this achievement what you have to do is a fast match chain sequence.

A match chain occurs when you destroy some blocks in a short period of time. When you have 3 matches, the match chain counter appears at the top left corner of the screen with the value of 1. Every subsequent match will count as one more.

To unlock this, you have to do something about 15 or more match chain. Then, if you go really fast, the Blazing Speed meter starts to fill up (left up corner) with a orange color. If, you keep going fast enough, when you complete +10 matches the blazing speed will be activated.

If you start the meter at 16, the Blazing Speed will be activated at 26.
I could get more than 50 match chain without activating Blazing Speed, so when the orange meter starts to fill up, don't even look at it. Concentrate on the board.

The LB button gives you hints about matches. Use it all the time, even when you see a match. Maybe it can give a hint about the next match you can do. Note that there's a delay between LB presses. So, some of the matches you will have to find by yourself.

There isn't much info on how to get this achievement out there, so are a few tips.
Always make the bigger match, such as bombs, lightning gems, hypers, and save them. Try to get them close to each other and have them all go off at once.

Try not to stare at a lightning gem going off or anything that is comboing, instead move to the other side of the board and try to make matches there as something is going off.

I actually noticed the cursor feel smoother and much faster to move around as I was getting close to popping this achievement, so if you notice that too, start matching like crazy, get in the zone and concentrate. I tried getting this achievement over 40 different times, and finally got a good board with awesome combos and easy matches. I actually ended up getting the platnium badge for this mode when I popped this achievement.

Finally, if you get stuck with a board that isn't doing much for you, press the back button on your controller. It resets the board and starts you over. I discovered this farming flushes for the gold poker badge, and it works across all modes. In my opinion, the fresh board you start with determines if you're going to have a good round or not. If you don't like your setup, save time and reset it.

I hope any of this helps!

The goal is to go as fast as possible with the 2nd priority of making big matches like bombs, stars, etc! When you make fast enough matches the upper left with start to fill up and as soon as you have the white words "Speed +(number)" filled in orange, the achievement will pop!

3-gem match = 100pts
4-gem match = 150pts

Took me a few tries until I finally got a board that gave me easy matches. Also if you need to reset, just hold your start button instead of backing all the way out. Your progress saves anyways and it's more time-efficient!