That said, typical games differ a lot from both puzzles and studies, especially in the following aspects:
1) You are not informed that you should search for a win NOW.
2) If you know nothing about positional chess and struggle with evaluation, you can still be great in solving puzzles and studies, but it will be harder in tournament games.
3) Puzzles and studies mostly have nice and aesthetically pleasing solutions. (poetry) Brilliancies are rare in everyday life. (prose)
4) In tournament games the lines are mostly more chaotic, less clear, and sometimes calculation is not that important, understanding might play a bigger role.
5) Puzzles and studies usually contain great ideas, but tournament games are mostly not decided by great ideas, but by unnecessary mistakes and sometimes even silly blunders.
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