Written and annotated by GM Alejandro Ramirez.
The Paulsen/Taimanov in Nakamura-Giri was an unbelievably deep preparation, especially when you take into consideration how early the novelty was in the game. Nakamura said he forgot which rook to play, chose the wrong one and was worse. A mistake by Giri allowed the American to equalize. A strange perpetual happened and the game was drawn.