by using apps such as this to learn, and solving tactical puzzles, analysing games , watching famous games and playing can i eventually achieve a 2500+ rating, without the help of a trainer?? where i live chess is not popular- Antarctica
Since you are an unknown, no one can tell you your potential. We have no idea how old you are, how much time you have to spend on chess, etc.
What's stopping you from getting a trainer? These days a lot of lessons are delivered online.
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