Tactic Toolbox Open Sicilian

Windows 10 or higher
Minimum: Dual Core, 2 GB RAM, DirectX11, graphics card with 256 MB RAM, (DVD-ROM drive), Windows Media Player 9, ChessBase 14/Fritz 16 or included Reader and internet access for program activation. Recommended: PC Intel i5 (Quadcore), 4 GB RAM, Windows 10, DirectX11, graphics card with 512 MB RAM or more, 100% DirectX10-compatible sound card, Windows Media Player 11, (DVD-ROM drive) and internet access for program activation.

MacOSX
only available as download! Minimum: MacOS "Yosemite" 10.10

Sicilian Defence

1.e4 c5 are the moves which define the Sicilian Defence. Black fights for the d4-square, but unlike with the double move of the black e-pawn the symmetry is immediately destroyed and Black is indicating that he is not simply aiming to achieve equality. Then things can continue in quite different directions. 2.Nf3 followed by 3.d4 cxd4 4.Nxd4 leads to the Open Sicilian. But before that, Black has the option of laying down the direction in which the opening will go, according to whether he plays 2...d6, 2...e6 or 2...Nc6. But nowadays systems in which White does without an early d4 are also very popular.