SquidElusion

Okay, I reset my progress, and paid attention to chapter unlocks. The Apple I mentioned unlocks the Final Chapter, Chapter 1 is in the Map Room. It's in PLANE sight if you look around...

Just one final problem. I found the word 'Corpses' for chapter 4 but after 1 hour of looking around and trying it in the cave puzzle i have absolutly no clue

I got it!!!

So i just solved the chess one. Now just the glitch

Glitches all have something in common. Remember what you had to find BEFORE in this room?
Chess: It is White's turn next and White can always win. There is always a 'best' next move for White which will force Black into only one possible move.