Project: Back To The Future

Your older brother bought an amazing gaming PC, but he won’t let you use it. He always makes stupid excuses like: “I’m just trying to protect you, it’s too powerful for you” - Older Brother. Fortunately he hasn't been at home for two days. It’s the perfect time to invite your friends over, turn it on and play your favourite videogames. It won’t be easy though, since big brother seems to be particularly cautious, and he protected it with a safety power system. Maybe he's hiding something on that PC. Could you find out what this is all about? Disclaimers: 1. You can play this room ALONE or bring SOME FRIENDS with you. 2. This is my first room. I wanted to submit it to the last competition, but I didn't manage to finish it in time. 3. Any kind of feedback, suggestion... is well accepted. Guide: HERE (Music by bensound.com) UPDATES: 1. Improved chess puzzle 2. Now you can actually play with your friends :') 3. The guide has been updated with more detailed solutions to some puzzles.