how many total puzzles are there?

Something like 50,000.

Is that enough for you?

I was wondering the exact same thing. I have attempted 2163 puzzles so far and it says that I have attempted 45% of all themes. 

Doing the math, (2163 / 0.45) that is about 4806 left to go.  So about (4806 + 2163) 6969 total puzzles? 

I'm not sure where they get the puzzles, but I would assume they must be adding more puzzles to this. 

Interestingly I came across a book called Chess: 5334 Problems, Combinations and Games by László Polgár who raised his three daughters to be chess prodigies.  Having read about his method, and as a beginner here to chess I've noticed that chess puzzles have definitely made me better at chess.  The puzzles alone is what sold me on the membership here.

45% of all themes is different than 45% of all puzzles.  And if it meant puzzles, which it doesn't,  your math is still wrong.  4806 would be the total number, you cant add the 2106, cuz that's counting them twice.  

But 2106 of YOUR puzzles covered 45% of the themes doesn't tell you much.  Are there 100 hundred themes and your 2106 puzzles covered 45 different themes?  Who knows.  You can't calculate the total number of themes from the information provided, let alone the total number of puzzles.  

Accordian to my calcifcations, perzactly,1 gazillion.

Thanks for correcting my math Forked_Again, you are correct - and that number (4806) seems like a pretty low number of puzzles.  I was assuming that all puzzles have an associated theme, so 45% of all themes logically sounded equal to all puzzles in that case. 

I have noticed that the puzzles are named with an ID number, although I have no idea if that is randomly generated or if it starts from 0 with the first puzzle. 

It's a bummer that we can't know the total amount, but nice to know that there's enough puzzles here to keep it interesting.

I'm going to find out how many puzzles there are. Based on the "rating" number (which I think is supposed to mean a sequence number) there are something like 600,000 puzzles. However, this number may actually refer to how many attempts have been made by all players to solve all puzzles. I also see there is a number for "Attempts", which I think is how many times the aggregate of subscribers have tried this puzzle, with the "Pass Rate" indicating what percentage of those people have successfully solved the puzzle.

One complaint I have is that some of the puzzles have a very precise move order, which isn't always necessary to achieve best results. Or at least it seems that way, since my name isn't Stockfish or Leela Zero.

I just got off a Reddit site, where there is a similar discussion which was archived some time ago. A guy who apparently works on the site says that after purging the less effective puzzles they still had about 60,000 puzzles and were planning to add about 1,000 to 2,000 per week.

Post #3... I just realized the Sequence Number is just that, and the "Rating" actually refers to the performance rating of the puzzle, e.g., if the rating is 1700, then it's expected that someone with a 1700 skill level should be able to solve it.

Based on this puzzle number, there must be more than 1.2 million

https://www.chess.com/puzzles/problem/1206250

I'm pretty sure that it says that there are over 150,000 puzzles.

of course the number had to contain 69 twice so I din't think it's true