Chess Opening Explorer
Study 3,600+ chess openings on an interactive board. Search by name or ECO code, step through moves, bookmark favorites, and track your study progress.
About Chess Opening Explorer
Pick an opening — say, the Sicilian Defence or B20 by ECO code — and a full move tree appears on an interactive board. Step forward and back through variations, read the theory behind each line, and bookmark the ones you're drilling this week. With over 3,600 openings catalogued, it covers everything from mainline classics to sharp sidelines most club players have never faced.
It works best as a companion to active play. Spot a line that surprised you in a game, look it up here, and trace exactly where the theory diverges from what your opponent played. Progress tracking lets you see which openings you've studied and which are still untouched. If you want to put that preparation to use straight away, Chess lets you test lines against an AI opponent without leaving the browser.
This is a games category reference tool — keyboard-friendly, no account required, and well-suited to short focused sessions between matches.
Look inside
How to use
• Browse and study chess opening variations from an extensive database • Use the search box to find specific openings by name or moves • Filter by ECO codes (A, B, C, D, E) using the colored chips • Click any opening from the left panel to load it on the board Board Controls: • Use arrow buttons or keyboard arrows (←/→) to navigate through moves • Click "Flip" to rotate the board perspective • Press "Auto" to automatically play through moves at selected speed • Click individual moves in the move list to jump to that position • Press "Reset" to return to starting position Features: • Mark openings as bookmarks (⭐) or studied (✓) for quick reference • Sort openings by name, popularity, or ECO code • Switch between "Openings" and "Bookmarks" tabs in sidebar • Click moves on the board to explore variations when available The goal is to learn and memorize chess openings by studying their move sequences and understanding common patterns.
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