Opening Explorer

Browse openings, watch demo videos, and fetch live stats from Lichess

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Select an opening to explore

Practice Mode

Play through openings move by move on the interactive board

Move History

    Select an opening and make your first move

    Flashcard Quiz

    Guess the next move — build muscle memory

    0correct
    0attempted
    0streak 🔥

    Press Start to begin

    Notation Guide

    Learn algebraic notation — how d4, Nf3, O-O and every symbol works

    Interactive Demo — Click a move to see it on the board

    Your Progress

    Track mastery across all openings

    SQL Lab

    Real SQLite in-browser — practice query optimization on chess data

    📋 Schema

    Loading database…

    Welcome to SQL Lab

    Select a challenge or write a free query. Try: SELECT * FROM games LIMIT 5;

    SQL Editor · Ctrl+Enter to run · Tab to indent
    Results Ready
    Run a query to see results here

    DB Monitor

    Live metrics — auto-refreshes every 5 seconds

    Never refreshed
    ⏳ Open SQL Lab first to initialize the database, then come back here.