Advantageous Transposition

Here is a game from the 2008 Russian Team Championship, GM Svidler - GM Alekseev with full annotations and commentary:

This game was a perfect example of the power of transpositions in chess. The game started off with white playing a Ruy Lopez opening but only a few moves later black was able to transpose the game into a King's Indian defense where it was black who has the more comfortable play.

If you would like more information about transpositions in chess then you should consider the book "Transpo Tricks in Chess" by Andrew Soltis (http://www.chess.com/eq/chess+books/transpo-tricks-in-chess)