Free chess tool
Learn openings by playing the lines
A curated library of the main openings for White and Black. Step through each line move by move, see Stockfish's take on every position, and drill the theory until it sticks.
Free to use · no account required
Chess position, White to move. White has king on e1, queen on d1, rooks on a1 and h1, bishops on c1 and f1, knights on b1 and g1, pawns on a2, b2, c4, d4, e2, f2, g2 and h2. Black has king on e8, queen on d8, rooks on a8 and h8, bishops on c8 and f8, knights on b8 and g8, pawns on a7, b7, c6, d5, e7, f7, g7 and h7. Arrows mark the moves from b1 to c3 and from g1 to f3.
What it does
Everything in the Opening Explorer
Curated White & Black lines
Start from a hand-picked set of the most important openings for each colour — no wading through a raw move database.
Play through the theory
Walk each opening move by move on the board. See the ideas unfold instead of staring at a wall of notation.
Stockfish on every position
The engine evaluates each position in the line, so you understand why the main move is the main move.
Know when you leave book
Make the moves yourself and the explorer flags the moment you diverge from theory — the exact spot to review.
Drill until it sticks
Replay a line as many times as you need. Repetition on the board beats memorizing a list of moves you'll forget.
Build a practical repertoire
Focus on a few solid openings you'll actually play, and spend your study time where it moves your rating.
How it works
Up and running in seconds
Choose an opening
Pick a line for White or Black from the curated library.
Play through it
Step forward move by move and watch the position and the engine eval develop.
Drill the moves
Make the moves yourself; the explorer tells you the instant you stray from theory.
Repeat and internalize
Run the line until it's automatic, then move on to the next one in your repertoire.
FAQ
Common questions
Is the Opening Explorer free?
Yes. You can study the curated openings and drill lines for free, with Stockfish evaluating every position.
Does it cover both White and Black?
Yes — the library includes the main openings for both colours, so you can prepare whatever you play.
Do I need to memorize long lines?
No. The point is to understand the ideas by playing them out on the board and drilling a few practical lines, rather than memorizing endless variations.
Can I check openings against the engine?
Yes. Stockfish evaluates each position as you move through a line, so you can see why the main moves are recommended.
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