Hi @codingdefined, thanks for the review.

Yep, it is better to divide the work across multiple commits. Let me just note that I am squash merging my new features as it is shown in this example: Feature/pgnsyntax (#3)

Is that okay? :) I'd like to squash merge the branches to keep the history of the project a bit more concise.

On the other hand, here is the reason behind so many additions. I just added a few sample PGN files for testing purposes, and those ones contain thousands of lines -- games-02.pgn is an example having 10004 lines.