Ruy Lopez, Berlin Defence, 4.0-0 d6 Notation: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. 0-0 d6
In each game under Location you see masterchessopen.com but it's not a valid website, so please don't use it. Claus Gamborg, Jan. 2023