In a game you stare at the board, never at a blank wall.
You train your attacks. You lose to theirs.
Puzzle lines are defended by an engine. Your opponents aren't.
Thousands of puzzles, rating stuck? Here's one reason.
Checks, captures, threats, for both sides, before every move.
Which one trains you to see the whole line?
Great authors. But a course ignores your level.
Free puzzles. So why do you still blunder in games?
Grinding tactics but still blundering? Try seeing the whole line.
Hide the board, or calculate over it?
Free blind checkmates, and what they leave out.
Finding the weak spot is half the job. Calculating is the other.