Am i allowed to make my own opening book out of a notebook or does that violate fair play?

Am i allowed to make my own opening book out of a notebook or does that violate fair play?

If you are using any sort of assistance during a live game, then yes. Reading an opening book by another person while playing or using it as reference is also considered cheating. However, if its a daily game, im pretty sure you are fine.

Of course, at the same time, they would never be able to tell if you are using a book or happen to know the first few moves. Even a lowly 1200 player could remember the moves 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.cxd5 exd5 5.Bg5 Be7 6.e3, and then suddenly start playing one bone head move after another like a typical 1200 player. Whether those moves were memorized or written down, they'd never be able to tell.

Now on the flip side, if a couple of 1200 players faced, committed one blunder after another in a slop fest of time control 30 0, and suddenly, after a dozen blunders each and 73 moves, you have the following:

And here all of a sudden, White plays perfect chess, there would be suspicion.

Perfect chess here by White would go something like 1.Rd2+ Kc6 2.Ke5 Re1+ 3.Kf6 Rf1 4.f5 Kc7 5.Ke6 Re1+ 6.Kf7 Rf1 7.f6 Kc8 8.Ke7 Re1+ 9.Kf8 Rf1 10.f7 Kc7 11.Rd4 Rf2 12.Ke7 Re2+ 13.Kf6 Rf2+ 14.Ke6 Re2+ 15.Kf5 Rf2+ 16.Rf4 +-

You are not allowed to use your notes during the game. You're not even allowed to take notes during the game (you're only allowed to write down the moves and the time used). Also ! or ? are not allowed, e.g. B. 1. d4 e5 ? But of course you can learn everything by heart and you can use your knowledge in all games.

You should practice your opening theory by playing with chess bots like isabel

Use your games to build your theory and study it, but don't play from a cheat sheet. Don't trust stalefish suggestions to be 100% PLAYABLE either.

I look at my peers' average games looking for lines that perform best following the other side's losses and sometimes finding mates in 8 or other traps, like: