Standard Starting Position
WHITE'S TURN
Grandmaster Opening Explorer & Theory Hub
Master deep Grandmaster opening theory, move annotations, core plans, and contingency playbooks.
Beginner Core
ECO B90
Black
Grandmaster / Sharp
Theory Move Sequence
Move 0 / 10
Sicilian Defense: Najdorf Variation
The sharpest and most deeply analyzed opening in chess history.
Deep Grandmaster Theory Overview
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Key Ideas & Objectives
Deep Dive & Game Review
Replay game turns, inspect move evaluations, test candidate branches, and preview predicted continuations.
Move 0 / 0
Best Moves
Select a move position to evaluate candidate branches.
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Coach Naomi's Review
Make moves or load a game to see Coach Naomi's detailed move breakdown.
Replay
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Advantage Graph
Move Quality Counts
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Decision Tree
Ply 1 / 10
Tap a best move to build a line from this ply. The right board shows exactly 10 plies ahead.
10-Ply Variation Sequence
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