Ponderchess / Openings
Understand how an unbalanced centre creates counterplay.
Black meets e4 with the c-pawn.
The open Sicilian trades a flank pawn for a central pawn.
In the Najdorf, ...a6 controls b5 and prepares queenside options.
Play the guided film, or select a scene to pause and study its position.
Opening
The Sicilian Najdorf in 3D
The Sicilian Defence is Black's most popular answer to 1.e4. Instead of copying White, Black fights for the centre from the side.
Rebuild the sequence yourself. The board responds to each move, and hints are available.
Click or drag to move · Arrow keys + Enter to play
Your turn · white to play
Select a piece, then its destination. Switch to 2D for a clear overhead view or rotate the 3D board to explore the position.
How Black trades a wing pawn for a centre pawn, and why ...a6 matters.
The white pieces
Develop fast and use your lead in development. Opposite-side castling with a kingside pawn storm is a common plan in the Open Sicilian.
The black pieces
Play on the queenside and in the centre with ...b5, ...Rc8 and the c-file. The ...d5 break is the thematic freeing move in many lines.
Look a little deeper · 01
In the Open Sicilian (2.Nf3 and 3.d4), Black trades the c-pawn for White's d-pawn. Black gets an extra central pawn and the half-open c-file; White gets a lead in development and attacking chances on the kingside.
Look a little deeper · 02
Black's main systems are the Najdorf (5...a6), the Dragon (with ...g6 and a fianchettoed bishop), the Sveshnikov (...e5 early), the Taimanov and the Scheveningen (...e6 and ...d6).
Look a little deeper · 03
White players who want to avoid the theory choose an anti-Sicilian: the Alapin (2.c3), the Rossolimo (2.Nf3 Nc6 3.Bb5), the Closed Sicilian (2.Nc3) or the Smith-Morra Gambit (2.d4 cxd4 3.c3).
How Black trades a wing pawn for a centre pawn, and why ...a6 matters.
Keyboard: Space pauses, the arrow keys step. Gold arrows are White's moves, violet are Black's, red rays are threats, green shows support, blue shows plans.
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