Vasily Smyslov Lopez and English Opening as White and the Sicilian Defense and Nimzo-Indian Defense as Black. He made enormous contributions to chess opening theory in many openings, including the English Opening, Grünfeld Defence, and the Sicilian Defence. He has a variation of the Closed Ruy Lopez named for him: the line runs 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Be7 6.Re1 b5 7.Bb3 d6 8.c3 0-0 9.h3 h6. In the Grünfeld Defence, the continuation 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 0-0 7.e4 Bg4 8.Be3 Nfd7 is known as the Smyslov Variation and remains a
Tactical decision game Lieutenant?", the games in the "Tactical Problems ..." series were based them on descriptions of actual engagements that took place between 1914 and 1953. Some of these were first-hand accounts written by S.L.A. Marshall, Erwin Rommel,and Friedrich von Mellenthin. Others were secondary works composed by military historians.) Regardless of the actual events that inspired them, all of the problems were modified to reflect the organization and equipment of the 1980s. Thus, none of these historically-inspired games can be classified as decision-forcing cases.) Tactical decision game A tactical decision game is a decision game that puts students in the role of