The moves before the combination
Robert provided me with 10 PGNs of the tactical problems I'm currently studying. I wanted to see whether it is necessary to study the moves that lead to a combination. The answer is "yes, but not now". The study of those moves is not necessary to understand the logical mechanisms of a combination. And you must learn those mechanisms first. I'm inclined to say that about 2000 puzzles, tactics and mates, would be sufficient. The next step would be to do the same, but then for positional problems. Think of the woodpecker 2 puzzles and the positional puzzles of CM Can Kabadayi. Then you need a set of endgame puzzles, like the series from Perlo for instance. It are tactical puzzles too, but the geometrics of the endgame differ vastly. And you need indeed to study moves that precede combinations. Or actually every move that causes Stockfish to swing the eval bar with >2.0 points. I guess you can summarize that under the noumer "study master games". Is my first...