The Bogo-Indian Defence: the b4 check against 1.d4, with plans and the cost measured

Short answer

The Bogo-Indian answers 1.d4 Nf6 2.c4 e6 3.Nf3 with 3...Bb4+, the check that forces White to commit before finishing development. This guide measures the defence in Stockfish 18 at depth 26: the starting position gives +0.38, nearly double the Nimzo-Indian, and two lines restore equality — 4.Bd2 a5 with 7.0-0, which zeroes the evaluation, and the immediate exchange on d2 against 4.Nbd2, which sits at +0.02. The expensive mistake is retreating the bishop after a3: +0.65.

The essentials in a few lines

• The position after 1.d4 Nf6 2.c4 e6 3.Nf3 Bb4+ measures +0.38 in Stockfish 18 at depth 26, against +0.19 for the Nimzo-Indian in the equivalent position after 3.Nc3 Bb4. The check costs roughly two tenths of a pawn.
• The engine's preferred answer to the check is not 4.Bd2 but 4.Nbd2 — blocking with the piece that has yet to develop, keeping the c1 bishop free.
• Against 4.Nbd2, Black's road is to exchange as soon as White plays a3: 4...0-0 5.a3 Bxd2+ 6.Bxd2 d6 7.e3 Nbd7 followed by ...e5 reaches +0.02. Retreating with 5...Be7 instead of exchanging hands White +0.65.
• Against 4.Bd2, the equalising line is 4...a5, keeping the bishop on b4: after 5.g3 d5 6.Bg2 0-0, the natural 7.0-0 zeroes the evaluation, while 7.Qc2 keeps +0.34.
• The classical line with 4.Bd2 Qe7 and the exchange on d2 sits at +0.33 after ...d6 and ...e5 — playable, and without automatic counterplay, which is the historical criticism of the defence.

A check that solves the move-three problem

The name comes from Efim Bogoljubov, and the logic is the Nimzo-Indian's: Black trades the dark-squared bishop for a tempo and for structural concessions, banking on a solid centre with pawns on d6 and e6. The difference is that here the bishop pins nothing — it gives check, and a check, unlike a pin, can be answered in three different ways.

From a repertoire point of view the Bogo solves a concrete and frequent problem. Anyone building a repertoire around the Nimzo-Indian soon finds that half their opponents play 3.Nf3, and needs a second defence: the Queen's Indian with 3...b6, a transposition with 3...d5, or the Bogo. Of the three, the Bogo demands the least memorised material — four typical structures cover almost everything.

That economy has a measurable cost, and this guide starts with it so the decision is an informed one. The position after the check measures +0.38 at depth 26, and the equivalent Nimzo-Indian +0.19. In absolute terms the difference is small, but it is double, and it shows up consistently in the main lines: the Bogo is solid, and solid does not mean equal.

Bogo or Nimzo, and what the gap means

The Nimzo-Indian pin carries immediate structural value: if White does not address it, ...Bxc3 doubles the pawns and leaves permanent queenside weaknesses. That threat is what buys Black the right to play without the bishop pair. In the Bogo the check threatens nothing beyond itself — White interposes a piece and the bishop will have to trade itself or retreat at some point, almost always without having caused structural damage.

In exchange, the Bogo produces positions in which it is very hard to lose quickly, and that has practical value of its own. There are no gambits, no direct attacks on the black king in the first twenty moves and no variation where a forgotten move costs the game. For someone playing a few tournaments a year with no time to keep theory warm, half a tenth of a pawn is a reasonable price for memorising nothing.

In practice the choice is not one against the other: it is about how much repertoire you want to maintain. A player who studies the Nimzo-Indian seriously and adds the Bogo against 3.Nf3 has a complete answer to 1.d4 with two blocks of knowledge. Anyone wanting a single block can play the Bogo against everything, accepting the numbers in this section, or the Queen's Indian, which asks for more theory and holds up slightly better.

Against 4.Bd2: keep the bishop with ...a5

The point of 4...a5 is modest and effective: the pawn takes a2-a3 away from White, the move that normally gains a tempo against the bishop. Without that resource the black piece sits on b4 undisturbed, and the exchange happens when Black chooses rather than when Black is forced. The cost is a queenside pawn move that weakens b5, in a structure where this rarely matters.

The classical alternative, 4...Qe7 followed by the exchange on d2, remains perfectly playable and is the line found in most books: after 5.g3 Nc6 6.Bg2 Bxd2+ 7.Nbxd2 d6 8.0-0 e5 the position measures +0.33. Black gets a solid structure with pawns on d6 and e5 and a slow game, but no obvious source of counterplay — the historical criticism of the Bogo, and the measurement agrees with it.

The comparison between the two sums up the practical choice. With 4...Qe7 you reach known, comfortable and slightly worse positions; with 4...a5 you accept a less common structure and obtain equality when White plays the most natural move. For anyone facing opponents of their own strength rather than home preparation, the second option usually pays better.

Against 4.Nbd2: trade on time, never retreat

Blocking with the knight is the engine's preference because it commits to nothing: the c1 bishop stays free for f4 or g5, and the interposing piece was heading for d2 in many set-ups anyway. White gains the option of a2-a3, forcing Black to declare, and that is where the game is decided — the black bishop is worth one tempo, and the only profitable trade is the one that answers the move which just spent it.

The retreat is expensive for a simple arithmetical reason: Black has used two moves (3...Bb4+ and 5...Be7) to place the bishop on a square it could have reached in one, while White has used one useful move (a3). Two tempi up with a free centre, White plays e4 and e5 and takes space: in the line measured, 6.e4 d5 7.e5 Nfd7 gives +0.65, a large opening advantage by the standards of a solid defence.

After the correct exchange the position is an Old Indian structure with White a bishop pair short of anything to attack. Black's plan is ...d6, ...Nbd7 and ...e5, with ...Re8 and eventually ...c6 and ...Qa5; White's plan is to take space with b4 or to finish development with Be2 — in the position after 7...Nbd7, 8.Be2 measures +0.52 and 8.b4 measures +0.50, while the natural 8.Bd3 restores equality. Knowing that difference is worth more than any long variation.

The four structures you need to recognise

The ...d6 and ...e5 structure is the most frequent and the one that gives the defence its identity. Black closes the centre, places the pieces behind his own pawns and plays for ...Re8, ...c6 and the ...e5-e4 advance once White commits on a flank. It is a manoeuvring position where the more patient player usually wins, and where missing the bishop pair matters less because the diagonals are shut.

The ...d5 structure appears mostly after 4.Bd2 a5 and turns the game into something close to a Queen's Gambit Declined with Black's problem bishop already resolved — which, in repertoire terms, is excellent news: the piece that usually runs out of squares in a closed defence was traded on move six. The versions with ...b6 and ...Bb7 call for attention to c4 and the e4 square, and transpose often into the Queen's Indian.

Recognising which of the four is on the board is practically the whole body of opening-specific knowledge the defence requires, and that is why it fits into a small repertoire. The decision rule is short: if White has played g3 and Bg2, prefer ...d5, which contests the bishop's diagonal; if White has played e3 and Bd3, prefer ...d6 and ...e5, which shut the b1-h7 diagonal before the bishop finds a target.

• ...d6 and ...e5: Old Indian structure, slow game, ...Re8 and ...c6 as the natural follow-up.
• ...d5: a Queen's Gambit with the dark-squared bishop already traded — the best version against g3 and Bg2.
• ...b6 and ...Bb7: transposition into the Queen's Indian, with an eye on the e4 and c4 squares.
• ...c5: Benoni structures, the sharpest option of the set — it asks for more calculation than the rest of this guide.
• In all of them, trading the b4 bishop is a decision, never a reflex.

Fitting the Bogo into a repertoire

The clear case in favour is the Nimzo-Indian player. You already know how to play with the bishop on b4, you already know the pawn structures that follow the exchange on c3, and the Bogo reuses both against the move order the Nimzo cannot reach. In hours of study, it is the cheapest possible addition to a repertoire against 1.d4.

The case against belongs to anyone who needs wins with Black rather than half points. The Bogo creates no imbalance by itself: if White plays carefully the game heads for an equal and somewhat dry position, and Black's winning chances come from the middlegame, not the opening. A player who must win a last-round game will find more raw material in the King's Indian or the Grünfeld.

For those who do adopt it, the practical recommendation is to study in the order the decisions appear: first the answer to 4.Nbd2, because it is the engine's preference and the line that punishes the wrong move hardest; then 4.Bd2 with ...a5; and only afterwards the transpositions. Two hours cover the essentials, and reviewed games do the rest — especially those that passed move ten with the bishop still on b4, which tend to show whether the trade was delayed too long.

Frequently asked questions

Openings mentioned in this guide

• Bogo-Indian Defense (E11)
• Nimzo-Indian Defense (E20)
• Queen's Indian Defense (E12)
• Catalan Opening (E00)