Is the Chessbook Sicilian Najdorf repertoire free?

Yes. Studying it on Chessbook is free, and so is the PGN download, which needs no account.

Can I download it as a PGN?

Yes: https://chessbook.com/courses/najdorf.pgn?band=1400-1600. Pick your rating first to download the version for your level. It imports into Lichess studies, ChessBase and other tools.

Why does it depend on my rating?

The main Black choices stay the same, but opponents at different ratings play different moves. Each rating's version prepares for the replies you will actually face, using millions of games between players at that level.

How much does it cover?

Every opponent reply that comes up in at least 1 game in 200 at your rating, picking lines that score well and are easy to remember.

Sicilian Najdorf repertoire for Black

By Chessbook. Free, with a PGN download.

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The core of the repertoire is the same at every rating. Enter your rating to maximize performance against your opponents.

Tuned for Lichess 1400-1600: 74 moves.

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[Event "Chessbook Sicilian Najdorf repertoire (1400-1600)"]
[Site "https://chessbook.com/courses/najdorf"]
[Annotator "Chessbook"]
[Result "*"]

1. e4 c5 2. Nf3 ( 2. Bc4 d6 3. Nf3 ( 3. d3 Nf6 4. Nf3 ( 4. Nc3 e6 5. Nf3 Be7
6. O-O ( 6. Bg5 O-O ) 6... O-O ) 4... e6 5. Nc3 ( 5. Bg5 Be7 6. Nc3 ) ( 5. O-O
Be7 6. Nc3 ) ( 5. c3 Be7 ) ) ( 3. Nc3 Nf6 4. Nf3 ( 4. d3 ) 4... e6 5. d3 ( 5. d4
cxd4 6. Nxd4 Be7 ) ( 5. O-O Be7 6. d3 ) ) ( 3. Qf3 Nf6 ) 3... Nf6 4. d3 ( 4. Nc3
) ( 4. Ng5 e6 ) ( 4. O-O Nxe4 ) ( 4. e5 dxe5 5. Nxe5 e6 ) ( 4. d4 Nxe4 ) ) (
2. d4 cxd4 3. Qxd4 ( 3. c3 Nf6 4. e5 Nd5 5. cxd4 d6 ) ( 3. Nf3 d6 4. Nxd4 (
4. Qxd4 a6 ) 4... Nf6 5. Nc3 ( 5. Bd3 a6 6. Nc3 e6 7. O-O Be7 ) 5... a6 6. Bg5 (
6. Bd3 ) ( 6. Bc4 e6 7. O-O Be7 ) ( 6. Be3 Ng4 ) ( 6. Be2 e6 ) 6... Nbd7 7. Bc4
( 7. Bd3 e6 ) 7... e6 ) 3... Nc6 4. Qd1 g6 ) ( 2. Nc3 e6 3. Nf3 ( 3. f4 d5 ) (
3. Bc4 a6 ) 3... a6 4. d4 cxd4 5. Nxd4 Qc7 ) ( 2. c3 d5 3. exd5 ( 3. e5 d4 ) (
3. d4 dxe4 ) 3... Qxd5 4. d4 ( 4. Nf3 Nf6 5. d4 e6 ) 4... Nf6 5. Nf3 ) ( 2. f4
e6 3. Nf3 ( 3. Nc3 ) 3... d5 4. e5 ( 4. exd5 exd5 ) 4... Nc6 ) ( 2. d3 g6 ) (
2. c4 e6 ) ( 2. Qf3 Nc6 ) 2... d6 3. d4 ( 3. Bc4 ) ( 3. c3 Nf6 4. d4 ( 4. d3 e6
) ( 4. e5 dxe5 5. Nxe5 Nbd7 ) ( 4. Be2 e6 ) 4... Nxe4 ) ( 3. Nc3 Nf6 4. Bc4 (
4. d4 cxd4 5. Nxd4 ) ) ( 3. Bb5+ Nd7 4. O-O a6 ) 3... cxd4 *

About this repertoire

The Najdorf Sicilian, with answers to every anti-Sicilian you will meet.

Chessbook's Sicilian Najdorf repertoire for Black, built from millions of games between players at your rating. It covers the moves your opponents actually play, to a 1-in-200 coverage target, and picks lines that score well and are easy to remember.

It's free: study it on Chessbook with spaced repetition, or download the PGN.