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The Flexible Réti

A flexible 1.Nf3 repertoire that builds active bishops and chooses the right central pawn break.

We begin with the kingside knight and keep the central pawns flexible until Black reveals a structure. The fianchetto bishop gives us lasting influence, while the c- and d-pawns choose when the centre becomes fixed or open. Some sidelines require sharp calculation, so flexibility does not mean avoiding concrete threats. Learn to recognize the pawn structure first, then coordinate the pieces around the central break that the position actually supports.

ClassicalSystem
chapters
9
lines
88
moves to know
388
Try the first line free

1. Queen’s Gambit Declined: the long diagonals

12 lines

We use the kingside fianchetto against Black’s solid d5 and e6 centre, then choose the right pawn challenge. The c-pawn asks the first question; the d- and e-pawns respond to Black’s structural choice. Watch how central exchanges change the bishops’ diagonals and open files for the rooks. Efficient development matters more than winning a pawn immediately, though a few careless black moves allow direct tactical pressure.

  1. Line 11.Nf3 d5 2.g3 Nf6 3.Bg2 e6 4.O-O Be7 5.c4 O-O 6.b3 d4 7.e3 c5 8.exd4 cxd4 9.Ne5 Qc7 10.Re1 Nc6 11.Qe2 Nxe5 12.Qxe5 Qxe5 13.Rxe5FreeLearn
  2. Line 2… 9.Ne5 Nfd7 10.Nxd7 Qxd7 11.d3Premium
  3. Line 3… 6.b3 c5 7.cxd5 Nxd5 8.Nc3 Nxc3 9.dxc3 Qxd1 10.Rxd1 Nc6 11.Be3 b6 12.Ne1 Bb7 13.Rd7Premium
  4. Line 4… 8.Nc3 Nc6 9.Bb2 Bf6 10.Qc2 b6 11.Nxd5 exd5 12.d4 Nxd4 13.Nxd4 cxd4 14.Rad1Premium
  5. Line 5… 7.cxd5 exd5 8.d4 Nc6 9.Bb2 Bg4 10.dxc5 Bxc5 11.Nc3Premium
  6. Line 6… 6.b3 b6 7.Bb2 Bb7 8.cxd5 Nxd5 9.d4Premium
  7. Line 7… 8.cxd5 exd5 9.d4Premium
  8. Line 8… 6.b3 c6 7.Bb2 Nbd7 8.d3 b6 9.e4 dxe4 10.dxe4 Nxe4 11.Nd4Premium
  9. Line 9… 5.c4 dxc4 6.Na3 Bxa3 7.bxa3 O-O 8.Bb2Premium
  10. Line 10… 6.Na3 O-O 7.Nxc4Premium
  11. Line 11… 4.O-O c5 5.c4 d4 6.e3 Nc6 7.exd4 cxd4 8.d3 Be7 9.Re1 O-O 10.Na3Premium
  12. Line 12… 5.c4 Nc6 6.cxd5 exd5 7.d4 Be7 8.dxc5 Bxc5 9.b3 O-O 10.Bb2Premium

2. Slav: challenge the active bishop

10 lines

Black’s c6 pawn supports d5 and leaves the light-squared bishop free to develop. We respond to that bishop’s actual square: h3 challenges it on g4, while c4 and Qb3 create central and queenside pressure against the f5 setup. Some exchanges give us the bishop pair; others produce queenless positions with doubled b-pawns. Learn the resulting plan rather than treating every pawn exchange as an automatic improvement.

  1. Line 11.Nf3 d5 2.g3 c6 3.Bg2 Nf6 4.O-O Bg4 5.h3 Bh5 6.c4 e6 7.d4 Nbd7 8.cxd5 exd5 9.Ne5 Bd6 10.f4Premium
  2. Line 2… 9.Ne5 Nxe5 10.dxe5 Nd7 11.Nc3 Nxe5 12.g4 Bg6 13.f4 Bc5+ 14.e3 Nc4 15.f5Premium
  3. Line 3… 7.d4 Bd6 8.Nc3 O-O 9.Qb3 Qc7 10.Nd2Premium
  4. Line 4… 5.h3 Bxf3 6.Bxf3 e6 7.d4 Bd6 8.Nd2Premium
  5. Line 5… 6.Bxf3 e5 7.d3 Bd6 8.e4Premium
  6. Line 6… 4.O-O Bf5 5.c4 e6 6.Qb3 Qb6 7.d3 Nbd7 8.cxd5 exd5 9.Qc2 Be7 10.Nc3 O-O 11.e4 dxe4 12.dxe4 Bg6 13.Nh4Premium
  7. Line 7… 8.cxd5 Qxb3 9.axb3 exd5 10.Bd2Premium
  8. Line 8… 8.cxd5 cxd5 9.Qxb6 Nxb6 10.Nc3Premium
  9. Line 9… 7.d3 Be7 8.Be3 Qxb3 9.axb3 a6 10.Bd2 O-O 11.Bc3 Nbd7 12.Nbd2Premium
  10. Line 10… 5.c4 dxc4 6.Na3 b5 7.b3 cxb3 8.Qxb3Premium

3. Symmetrical centre: develop with tempo

10 lines

Black’s early c5 and d5 pawns demand a direct response, so we challenge the centre with d4 before completing the usual setup. The resulting positions range from isolated-pawn blockades to sharp development gambits. Watch how Ne5 activates the g2 bishop and how exchanges open the d-file. A temporary pawn deficit can be justified by activity, but every tactical sequence must be calculated before claiming a material gain.

  1. Line 11.Nf3 d5 2.g3 c5 3.Bg2 Nc6 4.d4 Nf6 5.O-O e6 6.c4 dxc4 7.Ne5 Nxd4 8.e3 Nc6 9.Bxc6+ bxc6 10.Qxd8+ Kxd8 11.Nxf7+Premium
  2. Line 2… 7.Ne5 Bd7 8.Nxc4 cxd4 9.Bf4 Nd5 10.Nd6+ Bxd6 11.Bxd6 Nde7 12.Nd2 O-O 13.Qb3Premium
  3. Line 3… 9.Bf4 Be7 10.Nd6+ Kf8 11.Nxb7 Qb6 12.Nd6Premium
  4. Line 4… 7.Ne5 Nxe5 8.dxe5 Qxd1 9.Rxd1 Nd5 10.Nc3 Nxc3 11.bxc3 Be7 12.a4Premium
  5. Line 5… 9.Rxd1 Nd7 10.Na3 Nxe5 11.Bf4 Ng6 12.Bc7 Be7 13.Nxc4Premium
  6. Line 6… 6.c4 Be7 7.cxd5 Nxd5 8.dxc5 Bxc5 9.a3 O-O 10.b4 Be7 11.Bb2 Bf6 12.Qb3Premium
  7. Line 7… 6.c4 cxd4 7.Nxd4 Be7 8.Nc3 O-O 9.cxd5 exd5 10.Be3Premium
  8. Line 8… 7.Nxd4 Bc5 8.Nb3 Bb6 9.cxd5 exd5 10.Bg5Premium
  9. Line 9… 5.O-O cxd4 6.Nxd4 e5 7.Nxc6 bxc6 8.c4Premium
  10. Line 10… 4.d4 cxd4 5.Nxd4 e5 6.Nxc6 bxc6 7.c4 Be6 8.Nc3 Bb4 9.O-O Bxc3 10.bxc3 Ne7 11.Ba3 O-O 12.cxd5 cxd5 13.c4Premium

4. Queen-pawn sidelines: flexible central breaks

13 lines

These queen-pawn sidelines show why a flexible opening still needs concrete decisions. Early knights can support ...e5, exposed bishops can be exchanged, and a kingside fianchetto can be challenged before the centre grows. We use d4 or c4 according to the structure, then develop around the resulting targets. Pay special attention to the queen’s useful tempi and to the difference between a currently open diagonal and one that needs a pawn exchange.

  1. Line 11.Nf3 d5 2.g3 Nc6 3.d4 Bg4 4.Bg2 Qd7 5.O-O Bh3 6.Bxh3 Qxh3 7.c4 e6 8.cxd5 exd5 9.Nc3 O-O-O 10.Bf4Premium
  2. Line 2… 3.d4 Bf5 4.Bg2 e6 5.O-O Nf6 6.c4Premium
  3. Line 3… 2.g3 Nd7 3.d4 Nb6 4.Nc3 Bf5 5.Nh4 e6 6.Nxf5 exf5 7.Qd3 g6 8.Bg2Premium
  4. Line 4… 2.g3 Bg4 3.Bg2 Nd7 4.O-O e5 5.d4 e4 6.Ne5 Nxe5 7.dxe5Premium
  5. Line 5… 2.g3 Nf6 3.Bg2 Bf5 4.O-O e6 5.c4 Nbd7 6.cxd5 exd5 7.d3Premium
  6. Line 6… 5.c4 Be7 6.Qb3 b6 7.Nc3Premium
  7. Line 7… 6.Qb3 Qc8 7.Nc3 c6 8.Nh4 Bg6 9.Nxg6 hxg6 10.d4Premium
  8. Line 8… 2.g3 g6 3.c4 dxc4 4.Na3 Bg7 5.Nxc4 Nf6 6.Bg2 O-O 7.O-O c6 8.b3Premium
  9. Line 9… 3.c4 d4 4.Bg2 Bg7 5.O-O e5 6.e3Premium
  10. Line 10… 3.c4 Bg7 4.cxd5 Qxd5 5.Nc3Premium
  11. Line 11… 3.c4 c6 4.Qa4 d4 5.Bg2 Bg7 6.O-O e5 7.d3Premium
  12. Line 12… 4.Qa4 dxc4 5.Qxc4 Bg7 6.Bg2 Nf6 7.O-O O-O 8.d4Premium
  13. Line 13… 4.Qa4 Bg7 5.cxd5 Qxd5 6.Nc3 Qd8 7.Bg2Premium

5. Indian setups: bishops and central pressure

11 lines

We meet Black’s kingside fianchetto with two developed bishops and a centre chosen to suit the pawn structure. Against ...d6, d4 contests e5; against ...d5, c4 challenges the centre before it can close against b2. The sharpest lines turn on long-diagonal tactics, so check what moving a knight uncovers. Our aim is active coordination and useful central space, with material claims made only after the exchanges actually occur.

  1. Line 11.Nf3 Nf6 2.g3 g6 3.b3 Bg7 4.Bb2 O-O 5.Bg2 d6 6.d4 Nbd7 7.O-O e5 8.dxe5 Ng4 9.Qd2 Ngxe5 10.Nxe5 Nxe5 11.c4Premium
  2. Line 2… 9.Qd2 dxe5 10.h3 Ngf6 11.Nxe5 Nxe5 12.Bxe5Premium
  3. Line 3… 10.h3 Nh6 11.Rd1Premium
  4. Line 4… 7.O-O c5 8.c4 cxd4 9.Nxd4 Nc5 10.Nc3Premium
  5. Line 5… 7.O-O c6 8.Nbd2Premium
  6. Line 6… 6.d4 c5 7.c4 Nc6 8.O-O cxd4 9.Nxd4 Bd7 10.Nc3Premium
  7. Line 7… 5.Bg2 c5 6.c4 Nc6 7.O-O d5 8.cxd5 Nxd5 9.Bxg7 Kxg7 10.d4 cxd4 11.Nxd4 Nxd4 12.Qxd4+ Nf6 13.Qe5Premium
  8. Line 8… 5.Bg2 d5 6.c4 dxc4 7.bxc4 c5 8.O-O Nc6 9.Ne5 Nxe5 10.Bxe5Premium
  9. Line 9… 6.c4 c6 7.O-O Bf5 8.d3 Nbd7 9.Nbd2Premium
  10. Line 10… 7.O-O Nbd7 8.d4Premium
  11. Line 11… 7.O-O Bg4 8.d3 Bxf3 9.Bxf3 e6 10.Nd2Premium

6. English structures: choose the central moment

14 lines

English structures give us several ways to challenge Black’s centre. We may open it with d4, manoeuvre behind a fixed pawn chain, or gain kingside space before castling. The sharp lines often involve a temporary pawn sacrifice, so development must create concrete threats. Watch the queen’s safe squares and the long diagonal toward a1, especially when Black gains activity on the b-file after exchanges on c6.

  1. Line 11.Nf3 c5 2.g3 Nc6 3.Bg2 g6 4.c4 Bg7 5.Nc3 e6 6.h4 h6 7.d4 cxd4 8.Nb5 d5 9.cxd5 exd5 10.O-OPremium
  2. Line 2… 7.d4 Nxd4 8.Nxd4 Bxd4 9.Nb5 Be5 10.Be3Premium
  3. Line 3… 8.Nxd4 cxd4 9.Ne4 d5 10.Qa4+ Bd7 11.Nd6+ Kf8 12.Qa3Premium
  4. Line 4… 10.Qa4+ Kf8 11.Qa3+ Qe7 12.Nd6Premium
  5. Line 5… 6.h4 Nge7 7.h5 d5 8.h6 Bf6 9.d3Premium
  6. Line 6… 5.Nc3 Nf6 6.O-O O-O 7.d4 cxd4 8.Nxd4 Nxd4 9.Qxd4 d6 10.Qd3Premium
  7. Line 7… 8.Nxd4 d6 9.Nxc6 bxc6 10.Bxc6 Rb8 11.Bg2 Qa5 12.Qd2 Be6 13.b3 Rxb3 14.axb3 Qxa1 15.Nb5 a6 16.Na7Premium
  8. Line 8… 11.Bg2 Bb7 12.Rb1Premium
  9. Line 9… 7.d4 d6 8.dxc5 dxc5 9.Bf4 Nh5 10.Be3 b6 11.Qc1Premium
  10. Line 10… 9.Bf4 Bf5 10.Ne5Premium
  11. Line 11… 9.Bf4 Be6 10.Ne5 Nxe5 11.Bxe5 Qb6 12.b3Premium
  12. Line 12… 11.Bxe5 Bxc4 12.Bxb7 Qxd1 13.Rfxd1 Rad8 14.b3 Be6 15.Na4Premium
  13. Line 13… 5.Nc3 e5 6.O-O Nge7 7.a3 O-O 8.Rb1 a5 9.Ne1Premium
  14. Line 14… 3.Bg2 e5 4.c4 e4 5.Ng1 Nf6 6.Nc3Premium

7. Early fianchetto: occupy the centre

8 lines

An immediate black fianchetto allows us to occupy the centre with e4 and d4. We then develop actively, often placing the bishop on c4 and preparing e5 after castling. Some lines use queen checks or knight invasions; others build pressure on the open d-file. Keep the broad centre supported, and distinguish a useful space advantage from a concrete tactical threat before committing another pawn near either king.

  1. Line 11.Nf3 g6 2.e4 c5 3.d4 Bg7 4.dxc5 Qa5+ 5.c3 Qxc5 6.Na3 Nf6 7.Nb5 Na6 8.Be3Premium
  2. Line 2… 3.d4 cxd4 4.Qxd4 Nf6 5.Nc3 Nc6 6.Qa4 d6 7.e5 dxe5 8.Nxe5 Bd7 9.Nxd7 Qxd7 10.Be3Premium
  3. Line 3… 2.e4 Bg7 3.d4 d6 4.Bc4 e6 5.Bb3 Ne7 6.c3 O-O 7.h4 h5 8.Ng5Premium
  4. Line 4… 6.c3 b6 7.O-OPremium
  5. Line 5… 4.Bc4 Nf6 5.Qe2 O-O 6.O-O Nc6 7.e5 dxe5 8.dxe5 Ng4 9.Rd1 Bd7 10.e6Premium
  6. Line 6… 9.Rd1 Qe8 10.Bf4Premium
  7. Line 7… 6.O-O c6 7.e5 dxe5 8.dxe5 Nd5 9.h3Premium
  8. Line 8… 6.O-O Bg4 7.e5 dxe5 8.dxe5 Nd5 9.Nbd2 Nc6 10.Qe4 Bxf3 11.Nxf3Premium

8. Dutch: open lines against the king

3 lines

Against the Dutch f-pawn advance, we use d3 and e4 to challenge the centre directly. Accepting the pawn can give us developing tempi and attacking lines, while declining it leads to a more restrained central struggle. The gambit demands concrete compensation: active bishops, useful knight squares, and safe development. Keep the current pawn count separate from any future recovery, especially in the queenless line where Black loses castling rights.

  1. Line 11.Nf3 f5 2.d3 Nf6 3.e4 fxe4 4.dxe4 Nxe4 5.Bd3 Nf6 6.Ng5 g6 7.h4Premium
  2. Line 2… 5.Bd3 d5 6.Bxe4 dxe4 7.Qxd8+ Kxd8 8.Ng5 Ke8 9.Nc3Premium
  3. Line 3… 3.e4 d6 4.exf5 Bxf5 5.d4Premium

9. Other first moves: purposeful development

7 lines

Unusual opening moves still deserve a clear response: develop safely, identify the central break, and challenge advanced pawns with support. Black’s early b5 expansion gives us queenside targets, while ...d6 setups often lead back to familiar fianchetto structures. Some move orders allow a useful bishop tempo on a3 or a knight retreat that uncovers g2. Learn why the pieces belong on their squares, so a different order does not obscure the plan.

  1. Line 11.Nf3 Nf6 2.g3 b5 3.Bg2 Bb7 4.Na3 a6 5.c4 b4 6.Nc2Premium
  2. Line 21.Nf3 d6 2.d4 g6 3.g3 Bg7 4.Bg2 Nd7 5.O-O e5 6.dxe5 dxe5 7.Nc3Premium
  3. Line 3… 2.d4 Nf6 3.g3 Nbd7 4.Bg2 e5 5.O-O e4 6.Ne1Premium
  4. Line 4… 5.O-O Be7 6.c4 O-O 7.Nc3Premium
  5. Line 5… 3.g3 g6 4.Bg2 Bg7 5.O-O O-O 6.b3 Nbd7 7.Bb2Premium
  6. Line 6… 6.b3 c5 7.c4 Nc6 8.Bb2Premium
  7. Line 7… 6.b3 e5 7.dxe5 dxe5 8.Ba3 Qxd1 9.Rxd1 Re8 10.c4Premium