Why Panov's old Ruy is used in 2010

Magnus Carlsen (pictured), today's number one, recently played the Ruy Lopez with 5.d3. This is something old, strong, and relevant now. Other players are making this move part of their repertoire. Sometimes, d3 is played later as part of an Anti-Marshall Variation. By playing d3 on move 5, White is eliminating certain options available to Black against 5.0-0. The most immediate move prevented is 5...Nxe4 entering the Open Defense. That can also be prevented with 5.Qe2, which has been used by Tiviakov. Black still has many choices against 5.d3.

The following game is an old example of this line. White was International Master Vasily Panov (1906-1973). In 1929, he was Moscow champion. He was a strong attacking player who is better known as a theorist and writer. Black was International Master Peter Romanovsky (1892-1964). In the Soviet Championship he was first in 1923 and tied for first in 1927. Panov demonstrated how to conduct an attack by mobilizing his forces and utilizing his opponent's weaknesses.

I have used Panov's notes and added analysis and game references.