107,478 puzzles · 21 interactive opening studies

Learn the opening.
Then punish the mistakes.

Each study walks you through an opening on a live board: the ideas, the main variations, and the mistakes players actually make at 1300, 1600 and 2000+. Then drill those mistakes as puzzles from real Lichess games, checked by Stockfish.

Today's goal: 5 puzzles

Solve one puzzle a day to start a streak.

107,478
puzzles
911
openings
–
solved by you

Popular openings

Each has a study on a live board, and puzzles from real games to make it stick.

All 85 openings →
B20–B99Sicilian DefenseFor Black

Black refuses to mirror 1.e4 and fights for the centre from the side. Unbalanced from move one, which is exactly why it rewards the better-prepared player.

Study · mistakes by rating · 2 traps19,227 puzzles
C50–C59Italian GameFor White

The oldest developing scheme in chess: knight, knight, bishop, aim the pieces at f7 before deciding what to do with the centre.

Study · mistakes by rating · 3 traps10,164 puzzles
C00–C19French DefenseFor Black

Black lets White build a big pawn centre, then strikes it from the side with ...c5 and ...f6. Solid, resilient, and famous for one persistent problem piece.

Study · mistakes by rating7,222 puzzles
D06–D69Queen's Gambit DeclinedFor Black

Black keeps the extra centre pawn and accepts a slightly passive but rock-solid structure. One of the most respected and deeply analysed defences in all of chess.

Study · mistakes by rating · 2 traps6,248 puzzles
C60–C99Ruy LopezFor White

The oldest fully respectable way to meet 1...e5: pin the defender of e5, castle, and press for a small, lasting edge that has produced more grandmaster games than any other opening.

Study · mistakes by rating · 3 traps5,202 puzzles
B10–B19Caro-Kann DefenseFor Black

Black supports the centre with the c-pawn instead of the knight, solving the French Defense's classic bishop problem before it even arises.

Study · mistakes by rating · 2 traps4,787 puzzles
E60–E99King's Indian DefenseFor Black

Black lets White build the 'ideal' pawn centre on purpose, fianchettoes the bishop, and then attacks that very centre from the flank — hypermodern strategy at its sharpest.

Study4,494 puzzles
D10–D19, D43–D49Slav and Semi-Slav DefenseFor Black

Black supports d5 with the c-pawn instead of the e-pawn, so the light-squared bishop stays free; add ...e6 and you have the Semi-Slav, one of the richest defences in chess.

Study3,450 puzzles
C44–C45Scotch GameFor White

White grabs the centre with an immediate d4, trading a pawn for open lines and quick piece activity instead of the slow build-up of the Ruy Lopez or Italian.

Study · mistakes by rating · 1 trap3,393 puzzles
C33–C39King's Gambit AcceptedFor White

White offers a pawn on move two for open lines, fast development, and a direct attack on Black's king — the boldest way to start a game of chess.

Study · mistakes by rating3,218 puzzles
B01Scandinavian DefenseFor Black

Black hits e4 on move one and forces an open game at once: a lost tempo for the queen, in return for a clean, Caro-Kann-like structure and no theory-heavy pawn centre to fight.

Study · mistakes by rating2,852 puzzles
B06–B09Pirc and Modern DefenseFor Black

Black lets White build a full pawn centre, fianchettoes the king's bishop and then attacks that centre from the side. Flexible, risky and rich.

Study · mistakes by rating2,842 puzzles

Or just play

Random puzzles at your level, from every opening.

Every opening, one list

85 openings, searchable by name or ECO code, with everything the site has for each one. Don't know the name? Play the moves and find it.

Browse all 85 openings

From study to muscle memory

1Understand the ideas

Key positions on a live board, with arrows and short explanations of why each move is played.

2See the mistakes coming

The traps players really fall for at 1300, 1600 and 2000+, each checked by Stockfish and grounded in our puzzle data.

3Punish them in puzzles

Every study ends in a training set of real positions from that opening, so the patterns stick.

How the puzzles work

Every puzzle on this site is a moment from a real rated game on Lichess, played by two people rated 1800 or higher. Early in the opening, with the position still roughly level, one of them made a move that loses material or the game. The board shows you the position right after that mistake: you play the other side, and your task is to find the move that punishes it.

Stockfish checks every puzzle at depth 20. It keeps a position only when there is one clearly best answer and the advantage still holds at the end of the solution, so you are never asked to guess between two equally good moves. Puzzles are grouped by opening — from the Sicilian and the Ruy Lopez to rarer lines — so you can drill the traps in the openings you actually play, as White or as Black.

New to an opening? Start with a study: it explains the ideas and main variations on a live board and shows the mistakes players make at 1300, 1600 and 2000+. Then train the puzzles for that opening to make the patterns stick. The famous opening traps each have their own page too, and mistakes by rating shows which opening moves club players really get wrong. Read more about how the puzzles are made.