Gyamerz Analysis 作者： Gyamerz

The Chess.com Analysis Sandbox is a manual move-testing overlay that lets you visually calculate variations directly on your active board. It contains absolutely no chess engine, making it a fully legal visualization aid for exploring "what-if" scenarios without triggering anti-cheat systems.

Instead of trying to hold deep calculations entirely in your head, this extension creates a safe, interactive shadow board right on top of your current game.

Core Features:
-Visual Calculation: Drag and drop pieces to manually play out variations and test different move sequences.
-100% Engine-Free: Relies strictly on rule-based move legality. It provides no evaluations, no bar graphs, and no "best move" suggestions.
-Tactical Highlighting: Visually indicates legal destination squares, pinned pieces, and potential fork opportunities during your manual analysis.
-Instant Sync: Use the on-screen Reset button or press 'R' to instantly snap the board back to the actual, live game position.
-Universal Compatibility: Works seamlessly across live games, puzzles, and analysis boards.

How to Use:

1.Click the "Toggle Sandbox" button or press Alt + Shift + C to activate the overlay.
2.The real board is safely hidden while you interact with the shadow pieces.
3.Drag and drop pieces to calculate lines.
4.Press R to reset the sandbox and return to the live game state.