Nimzo-Indian Leningrad Variation: 4.Bg5 Adviser and Replay Lab

The Nimzo-Indian Leningrad Variation begins with 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Bg5. White pins the f6-knight early and often follows with d5, e3, f3 or kingside expansion. Start with the Leningrad Start diagram to see the defining move.

The earliest clean Leningrad move order is 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Bg5. The move 4.Bg5 separates this page from Rubinstein 4.e3, Classical 4.Qc2, Sämisch 4.a3 and Three Knights 4.Nf3. Use the Leningrad Start diagram as the anchor.

White plays 4.Bg5 to pin the f6-knight and make Black solve central tension immediately. The move encourages space-gaining lines with d5 and can lead to sharp attacking structures. Use the d5 Space Gain diagram.

The Leningrad Variation is aggressive because White develops the bishop outside the pawn chain and often grabs space with d5. It can become extremely sharp when f3, h4, g-pawn tension or ...b5 counterplay appears. Use the g-pawn Battle and b5 Counterplay diagrams.

Black tries to challenge the centre before White's pin and d5 space become permanent. Common methods include ...h6, ...c5, ...Bxc3+, ...d6, ...e5, ...g5 and even ...b5. Compare the h6 and Bh4 diagram with the b5 Counterplay diagram.

Yes, it is a major Nimzo-Indian fourth-move system. It is more immediately active than Rubinstein 4.e3 and less structurally forcing than Sämisch 4.a3. Use the Branch Map to compare the main Nimzo choices.

White's main plan is to use Bg5 and d5 to seize space and make Black's pieces awkward. White then decides whether to support the centre with e3, Nf3, f3 or kingside play. Use the d5 Space Gain diagram.

White plays d5 to gain space and restrict Black's central freedom. The move also forces Black to choose between counterattacking the centre and accepting a cramped structure. Use the d5 Space Gain diagram.

White plays e3 when supporting the d4-d5 centre is more important than immediate tactical action. The move gives solidity but can also leave the dark squares sensitive if Black plays ...e5 or ...g5. Use the Bxc3+ and bxc3 diagram.

White plays f3 to prepare e4 and build a broad centre. In Leningrad structures this can be powerful, but it also gives Black hooks for ...g5 or dark-square play. Use the g-pawn Battle diagram.

White can attack on the kingside when the centre is closed or when Black's king becomes exposed by ...g5 and ...h-pawn play. The attack usually needs concrete calculation because both sides may open files quickly. Use the g-pawn Battle diagram and matching replay group.

White should avoid playing Bg5 and d5 without a plan for Black's counterplay. If Black breaks with ...c5, ...b5 or ...e5 at the right moment, White's centre can become a target. Use the Leningrad Adviser with side set to White.

The Leningrad is good for club players who like space, initiative and forcing structural choices. It is less forgiving than quieter Nimzo systems because one slow move can let Black seize the dark squares. Use the Position Trainer before adding long theory.

Black often replies with ...h6, ...c5, or both. The idea is to ask the bishop to move and then attack White's centre before it becomes stable. Use the h6 and Bh4 diagram.

Black plays ...h6 to question the bishop and reduce the pressure on the f6-knight. After Bh4, Black often follows with ...c5, ...d6 or sharper counterplay. Use the h6 and Bh4 diagram.

Black plays ...c5 to challenge d4 and make White's d5 advance a concrete decision. This is the main way to stop White from getting a free space advantage. Use the d5 Space Gain diagram.

Black plays ...Bxc3+ to damage White's queenside structure and fight for dark-square control. The exchange is especially useful if White's bishops cannot open the position quickly. Use the Bxc3+ and bxc3 diagram.

The point of ...g5 is to gain space, chase the bishop and create dark-square or kingside counterplay. It is risky because it can also weaken Black's own king. Use the g-pawn Battle diagram.

The point of ...b5 is to attack the c4-pawn and undermine White's d5 centre before White consolidates. It is a direct counterattacking idea made famous by Spassky-Tal. Use the b5 Counterplay diagram.

Black can play for a win because the variation creates early imbalances and pawn tension. The supplied games include Black wins by Tal, Beliavsky, Vyzmanavin, Morovic, Vaganian, Short, Karpov, Polgar and Naiditsch. Use the Replay Lab's counterplay groups.

Black should avoid passive development that lets White keep the pin, the d5 space and easy central support. The whole point of Black's setup is to question White before the centre becomes fixed. Use the Leningrad Adviser with side set to Black.

Start with Spassky-Tal, Tallinn 1973, because it shows Black's dynamic ...b5 counterplay against the Leningrad centre. The game is a memorable reminder that White's space can be attacked immediately. Use the b5 Counterplay replay group.

Bareev-Olafsson, Hastings 1990, is a useful model for White's space-gain plan. White uses d5 and the bishop pin to create long-term pressure and passed-pawn chances. Use the d5 space-gain replay group.

Bareev-Sax, Hastings 1990, is a strong model for a sharp g-pawn battle. The game shows how h-pawns, g-pawns and piece activity can outweigh material or structural concerns. Use the g-pawn and kingside attacking replay group.

Bareev-Beliavsky, Leningrad 1990, is a strong model for Black dark-square control. Black uses ...g5, ...Bf5, ...e4 and piece coordination to make White's centre collapse. Use the Bxc3+ and doubled-pawn replay group.

Rapport-Yu Yangyi, Athens 2012, is a useful modern model with direct piece activity and tactical tension. It shows that 4.Bg5 remains dangerous in sharp hands. Use the Modern elite Leningrad replay group.

The Leningrad Replay Lab uses 23 supplied 4.Bg5 PGNs. They are grouped by the Leningrad start, h6 and Bh4 structures, d5 space gains, Bxc3+ battles, kingside attacks and modern model games. Use one optgroup at a time in the Replay Lab.

Study Leningrad first if you want immediate activity and space with 4.Bg5. Study Rubinstein first if you want the broader 4.e3 structure before choosing sharper systems. Use the Branch Map to move between both pages.

Study Leningrad before Sämisch if you want active development without forcing the bishop-pair trade immediately. Study Sämisch first if you want the direct 4.a3 structural bargain. Use the Branch Map to compare both pages.

White should study 4.Bg5, h6/Bh4, d5 and Bxc3+ structures first. Those ideas explain the majority of model games before the sharper g-pawn lines are added. Use the first four diagrams in order.

Black should study ...h6, ...c5, ...Bxc3+ and one active counterpunch such as ...b5 or ...g5. Those tools stop White from getting a free space advantage. Use the h6 and Bh4, Bxc3+ and b5 diagrams.

After this Leningrad page, compare Rubinstein 4.e3, Classical 4.Qc2, Sämisch 4.a3, Three Knights 4.Nf3 and Fischer 5.Nge2. Those pages show different ways White handles the b4-bishop and the c3 pin. Use the Branch Map links as the Nimzo zoom-in path expands.