Puzzle 164713:
Puzzle 164713:
Vincent Keymer (2558) - Arkadij Naiditsch (2626)
53rd Biel GMT 2020 Biel SUI (3), 2020.07.23 Keymer - Naiditsch, Biel 2020
53rd Biel GMT 2020 Biel SUI (3), 2020.07.23 Keymer - Naiditsch, Biel 2020