Master level? Master level is 2400 FIDE.
elo ratings??

Master level? Master level is 2400 FIDE.

1600 is a decent player but keep in mind that tactics ratings usually run higher than your actual rating. I have CT-ART as well as a few other Chess King modules and my rating across them all is almost 2300 while my last OTB rating wasn't quite 1900.
+1
Seriously, there is more to chess than tactics. In all phases of the game, but especially in the opening, one needs a solid understanding of positional chess in order to achieve a middle game that your comfortable playing. If everything on the board is equal, then you need to be able to decide on a move that will have repercussions long into the game, especially if your moving a pawn.
Nobody can figure out all possible tactics in a given position, for one thing it depends highly on just how far forward you want to calculate, and the clock is ticking, so if everything else being equal, one must be able to look at the board from a positional angle, and think about a move that will bend to board position to something that could be more favorable to you at some later time in the game.
An early example would be trying to decided if you want to fianchetto a bishop to g2 or would you prefer to move h3 to keep black's bishop out your territory, or perhaps just keep the king pawns in a solid line. There's a chess saying that moving a pawn in front of your king weakens the pawn structure in front of the king. -But not moving one of your king pawns opens to door to a later back rank mate if none of the pawns ever move, and then your stuck burning a tempo to give your king some breathing room a time when you might need that tempo desperately to keep pressure on your opponent.
The greatest attack of all can easily be spoiled if your opponent finds an opportunity to land a back rank mate. Suddenly giving your king some breathing room is all the tempo your opponent needs to go from defending to permanent offense.
Don't fear the back rank mate too much though. If you don't completely forget about the pawns in front of your king, there are usually plenty of opportunities in the middle game to decide how to give your king some breathing space, and usually by then, you can better decide which pawn is the best pawn to move.
Is my rating good given the time span and do the ratings on CT ART4 give a fair assessment of my game?