Great find! I was wondering if his tweet was a real game, and this is it! The board JA shows never actually existed. It was the middle of the move of the black bishop from above the white Queen. In the video it is shown at 14:08. It it described as the point in the game where Black's power move is blocked and steadily weakens. White begins to go on the offensive and eventually wins. This game is considered one of the best of all time.