Blitz rating
These achievements keep track of your highest Blitz rating obtained (multiple of 100).
Keep improving in Blitz and you will keep getting achievements!
There are many overlapping achievements. First one is for 900 rating and you obtain a new achievement for each 100 more rating you get (1000, 1100, 1200, etc).
For more information regarding what games count for achievements check my Blitz Games page.
