Chess Notation

Hey, guys. I'm reading Victor Bologan's book on the King's Indian Defence and I'm having a hard time finding some of the notation that he uses at the end of a game to mark whether or not it's even, a draw, slightly better for white, etc. Some of the notation I could find on the wikipedia page for algebraic notation. But, some I could not. For instance, one game is has an arrow on top pointing to the right and an arrow on bottom pointing to the left. Could mean both sides have attacking chances. Another symbol, the infinity symbol (an eight on its side), I'm unsure about.

If there is a resource you know that could help me find some more lesser known notation, please let me know.

-Chilos

Edit: found the infinity symbol here: https://en.wikipedia.org/wiki/Chess_annotation_symbols.

 Thanks Urk.