Ruy Lopez Blue chess computer in Game 2 of their 1997 match. Svetozar Gligorić has been the most prolific C93 player. 9...Qd7 is another variation by Smyslov. Of the variations in this section, the Berlin and Schliemann Defences are the most popular today, followed by the Classical Defence. and other less-common third moves for Black. The Cozio Defence (part of "ECO" C60), 3...Nge7, is distinctly old-fashioned and the least popular of the defences at Black's third move. Although Bent Larsen used it occasionally with success, it remains one of the least explored variations of the Ruy Lopez. The Smyslov Defence, Fianchetto Defence,
Ruy Lopez bxc6 10.d4, or postpone d4 for the time being and play 8.d3 followed by manoeuvering the queen knight to the kingside with Nbd2–f1–g3. An alternative to 6...d6 is 6...b5 7.Bb3 Bb7. This is known as the Trajković Variation. Black may sacrifice a pawn with 8.c3 d5 9.exd5 Nxd5 10.Nxe5 Nxe5 11.Rxe5 Nf4. After 6.Re1 b5 7.Bb3, Black often plays 7...0-0. Here White can play 8.c3, but he has other moves. Alternatives are 8.a4, 8.h3, 8.d4, and 8.d3, which are often called "anti-Marshall" moves. White can also play 8.Nc3 with the idea of playing 9.Nd5 later. In the case White does