What Is the Réti Opening?
The Réti Opening is 1.Nf3 d5 2.c4. White attacks Black's d5 pawn from the side instead of putting pawns on e4 and d4 at once. It's named after Richard Réti (1889 to 1929), the Czechoslovak player who was one of the leaders of the hypermodern school. Its idea is to control the center from the wings, with pieces and flank pawns. Its ECO code is A09. Some books also use the name for the first move 1.Nf3 alone, which is better known as the Zukertort Opening. Is it good? Yes. In our October 2026 test, Stockfish 19 at depth 30 rated 1.Nf3 about 0.17 pawns better for White, almost the same as 1.e4 at 0.18 and a little more than 1.d4 at 0.12. After 1.Nf3 d5 2.c4, the engine's first choice for Black was 2...d4, and it rated that level. Our Réti Opening course has 5 lines, all from White's side: two against 2...d4, one against 2...c6, and two that start with g3: a double fianchetto setup and the King's Indian Attack.
Key Moves in the Réti Opening
After 1.Nf3 d5 2.c4, Black has four main answers. 2...e6 and 2...c6 hold the d5 pawn, and they often turn into a Queen's Gambit or an English Opening. After 2...e6, the move 3.d4 gives a Queen's Gambit Declined, and 3.g3 Nf6 is the Neo-Catalan. After 2...c6, 3.d4 gives a Slav Defense, and 3.e3 Nf6 4.Nc3 e6 5.d4 gives a Semi-Slav. The two answers that keep the game a true Réti are 2...d4 and 2...dxc4. 2...d4 is the Advance Variation, a Benoni with the colors reversed. White answers it with the solid 3.e3 or the sharper 3.b4, and 3.b4 c5 is the Michel Gambit. 2...dxc4 is the Réti Accepted. White wins the pawn back with 3.e3 or 3.e4, and 3.Na3 and 3.Qa4+ are good too. White can also wait with c4. 2.g3 is the King's Indian Attack, and 2.b3 is the Nimzo-Larsen Attack. Black has odd first moves as well: 1...Nc6 is the Black Mustang Defense and 1...e5 is the Ross Gambit.
1.Nf3 d5 2.c4 d4 3.b4 c5 4.e3Réti Opening Strategy & Ideas
White's plan is to fight for the center with pieces and flank pawns, not to fill it with pawns. The knight on f3 watches e5, the c4 pawn hits d5, and a bishop on g2 looks down the long diagonal at Black's queen side. Against 2...d4, White plays like Black in a Benoni. The king's bishop goes to g2, and the queen side pawns move up with b4. That's where the main fight is. White tries to undermine the d4 pawn with e3, b4 and a bishop on b2, and Black tries to keep it as a wedge. In our engine line after 3.b4, play went 3...c5 4.Bb2 f6 5.e3 e5, so Black used both side pawns to hold d4. In the setups with g3 first, White castles early and decides on the center later. In our double fianchetto line, the engine answered 6...c5 with 7.c4 and 8.e3. In our King's Indian Attack line, White went d3, Nbd2 and e4 instead. Our view: the Réti asks for understanding more than memory, because the same piece setup works against most of Black's replies.
Typical Pawn Structures
The Advance Variation gives the most typical Réti structure. Black's pawn on d4 gains space and takes the c3 and e3 squares from White's pieces. White's pawns on c4 and b4 gain space on the queen side instead. If Black backs the d4 pawn with ...c5 and ...e5, the result is a reversed Benoni, where White's queen side play and the long diagonal from g2 face Black's space in the center. In our engine's 3.e3 line, Black answered with ...c5, ...Nc6 and ...e5, and White traded on d4 at move eight. After 2...c6 or 2...e6, the structure depends on whether White plays d4. With d4 it's a Queen's Gambit or Slav structure. Without it, White's pawns on c4 and e3 stay flexible, and the bishop on g2 presses on d5. In the King's Indian Attack, White's pawns go to d3 and e4, and the game looks like a King's Indian Defense with the colors reversed.
Common Mistakes to Avoid
All numbers in this section are Stockfish 19 at depth 22. First, for Black: 1...e5, the Ross Gambit. It gives up a pawn without enough in return, and after 2.Nxe5 our test rated White about one and a half pawns better. Second, for White: the Tennison Gambit, 1.Nf3 d5 2.e4. It sets traps, but after 2...dxe4 3.Ng5, both 3...Bf5 and 3...e5 left Black a pawn or more better in our test. Third, for Black: 1...Nc6, the Black Mustang Defense. It's playable, but after 2.d4 our test gave White about 0.55 pawns. For comparison, 1...d5 and 1...e6 rated about 0.17 at depth 30. Fourth, for Black: trying to keep the extra pawn in the Réti Accepted with ...b5. The second trap below shows why.
Common Traps in the Réti Opening
Both traps below are ones Black has to avoid. The first comes from the Tennison Gambit, 1.Nf3 d5 2.e4, a 1.Nf3 sideline that the book files under the Zukertort Opening. After 2...dxe4 3.Ng5 Nf6 4.d3 exd3 5.Bxd3, the natural 5...h6?? loses the queen. 6.Nxf7! forks the queen and the rook, and if 6...Kxf7, then 7.Bg6+! Kxg6 8.Qxd8. The bishop's check opens the d file, so White's queen takes Black's queen. Stockfish 19 at depth 22 scored White more than four pawns better after 5...h6. The engine's move there was 5...Nc6, which kept Black about a pawn better. The second comes from the Réti Accepted. After 1.Nf3 d5 2.c4 dxc4 3.e3, holding the pawn with 3...b5?! runs into 4.a4!. The a pawn attacks b5 at once. After 4...c6 5.axb5 cxb5 6.b3, our test rated White about 0.9 pawns better, and the capture 6...cxb3? came out about three and a half pawns for White. Even Black's best answer to 4.a4, which was 4...b4, left White about 0.7 pawns better. Plain development is the safer road: after 3.e3, the engine's choices were 3...e6 and 3...Nf6, both at about a quarter of a pawn for White.
Famous Réti Opening Players & Games
By Réti's own account, he brought the opening into master play early in 1923. Hans Kmoch gave the names Réti Opening and Réti System to the way Réti played against Akiba Rubinstein at Karlovy Vary in 1923. That game is still a model for the opening. The best known Réti game came a year later. At New York 1924, Réti beat the reigning world champion José Raúl Capablanca in 31 moves. It was Capablanca's first loss in eight years, and his first since he became world champion. Alexander Alekhine played the Réti in the 1920s too, at a time when almost any game with Nf3 and c4 got the name. Savielly Tartakower put Zukertort's name next to Réti's, and he wrote that by 1923, 1.Nf3 had become the opening of the future. The biggest recent win came in the 2024 World Championship in Singapore. In game 11, Gukesh Dommaraju played 1.Nf3 d5 2.c4 d4 3.b4 c5 4.e3 against Ding Liren and won in 29 moves, which put him in the lead for the first time. He won the match 7½ to 6½ and became, at 18, the youngest undisputed world champion.
Frequently Asked Questions
Is the Réti Opening good?▼
Yes. It's as sound as the main first moves. In our October 2026 test, Stockfish 19 at depth 30 rated 1.Nf3 about 0.17 pawns for White, against 0.18 for 1.e4, 0.12 for 1.d4 and 0.10 for 1.c4. Réti beat world champion Capablanca with it in 1924, and Gukesh won a world championship game with it in 2024. Our view: it suits players who like plans more than forcing lines.
What is the main line of the Réti Opening?▼
The Réti starts with 1.Nf3 d5 2.c4, and Black's most independent reply is 2...d4, the Advance Variation. White then plays 3.e3 or 3.b4. Gukesh's 2024 world championship win went 3.b4 c5 4.e3. In our test, Stockfish 19 at depth 30 picked 2...d4 as Black's best move and rated it level, with 2...e6 at about 0.17 pawns for White.
How should Black play against the Réti Opening?▼
Black has three good roads. 2...d4 takes space, and it was the engine's first choice at depth 30, rated level. 2...e6 and 2...c6 hold d5 and often lead to a Queen's Gambit or Slav position, at about 0.3 pawns for White in our depth 22 test. 2...dxc4 is fine too, at about 0.2, as long as Black doesn't try to keep the pawn with ...b5. Our view: pick the reply that leads to a position you already know from 1.d4 games.
Is the Réti Opening the same as the Zukertort Opening?▼
Not quite. The Zukertort Opening is the first move 1.Nf3 on its own. The Réti is 1.Nf3 d5 2.c4, where White adds the c pawn, fianchettoes at least one bishop and doesn't play an early d4. Some books use the two names loosely. The Tennison Gambit, 1.Nf3 d5 2.e4, is filed under the Zukertort, not the Réti.
What is the Tennison Gambit?▼
It's 1.Nf3 d5 2.e4, a pawn gambit named after Otto Mandrup Tennison, an amateur who researched it in the 1800s. It's unsound: after 2...dxe4, our test with Stockfish 19 at depth 22 had Black about 1.2 pawns better. It does have traps, and 3.Ng5 Nf6 4.d3 exd3 5.Bxd3 h6?? 6.Nxf7! wins Black's queen. Black does best with 3...Bf5 or 3...e5 after 3.Ng5.
What is the difference between the Réti Opening and the King's Indian Attack?▼
The Réti plays c4 early and fights for d5 from the side. The King's Indian Attack, 1.Nf3 d5 2.g3, keeps the c pawn home and builds with d3, Nbd2 and e4, like a King's Indian Defense with the colors reversed. Our course has both: three lines with 2.c4, plus a double fianchetto line and a King's Indian Attack line with 2.g3. In our test with Stockfish 19 at depth 22, 2.g3 rated about 0.10 pawns for White, and the end of our King's Indian Attack line came out about level.
Related Openings
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