@meko I noticed you following me to "Puzzle or not?" As mentioned already in my spoiler "Step-by-step solution" I had come around by then to considering it an exploit: "note: having him cross this opening is considered an exploit of passing over objects in motion." You have to remember that I only downloaded/joined Mekorama on 21 July. I tried to learn quickly.
Hummm, after reading the spoilers it seems I didn't find the designed solution, but... I like more my solution where B suffers pain instead of my fingerprint...
