Grunfeld Defense: What Each Rating Plays After 3...d5, and the 5.Nxd5 Slip

The Grunfeld Defense is the opening where Black hands over the centre and then attacks it. After 1.d4 Nf6 2.c4 g6 3.Nc3 d5, White can build a huge pawn wall, and the whole game is whether that wall is a battering ram or a target. The pages we opened list the named variations and say little about which of them people at your level will actually face. We ran the maia3-5m checkpoint, see how Maia chess actually works, on two positions at seven rating bands from 1000 to 2200 and graded every legal move with Stockfish 18 at depth 20. Percentages on this page are Maia3's predicted probability that a player at that rating chooses the move. They are model predictions of human play, not game counts or win rates.

Every evaluation is from White's side, so +0.40 means White is slightly better by two fifths of a pawn. The two dataset positions are the one after 3...d5 with White to move, and the one after 4.cxd5 Nxd5 with White to move. The line checks are separate local runs of ten seconds per line at depths 22 to 26, which we call our local Stockfish check, so expect a position to differ by several hundredths between methods.

What the Grunfeld is, and where it came from

The defining moves are 1.d4 Nf6 2.c4 g6 3.Nc3 d5, which is ECO D80. The true Grunfeld runs D80 to D99, while D70 to D79 is the Neo-Grunfeld, where White delays or avoids Nc3. The Exchange Variation 4.cxd5 is D85 to D89, 4.Nf3 starts at D90, and the Russian System with 5.Qb3 is D96 to D99.

It is named after Ernst Grunfeld, who introduced it into international play at Bad Pistyan in 1922. His best known early win was over Alekhine in Vienna on 18 November 1922, in 55 moves. The structure is older: Wikipedia and Masterinchess cite an 1855 game in Calcutta, Moheschunder Bannerjee against John Cochrane, as the first instance. Classical theory saw a big pawn centre as an advantage, and hypermodern players saw it as a liability to attack. The Grunfeld is that argument in opening form.

Famous games and players help here only a little. Fischer's Game of the Century against Byrne in 1956 reached a Grunfeld by transposition: it began 1.Nf3 Nf6 2.c4 g6 3.Nc3 Bg7 4.d4 O-O 5.Bf4 d5, ECO D92. Kasparov used the opening often in his matches against Karpov and Kramnik, and favoured the 7...Na6 Prins setup against Karpov. As of October 2026, Wikipedia lists Carlsen, Vachier-Lagrave, Svidler, Anand and Nepomniachtchi among 21st century users, though the list is undated.

The first decision: what White plays after 3...d5

This is the position at the heart of the first table. Stockfish ranks 4.h3 first at +0.40, but 4.cxd5 is +0.39 and 4.Nf3 is +0.36, so the three are effectively tied. The Bf4 and Bg5 moves are both +0.19, 4.e3 is +0.20 and 4.c5 is the clear misstep at -0.39. Here is what Maia3 predicts people play.

In the table, "out" means the move was outside Maia's top five at that band. It does not mean zero probability. The engine's own favourite, 4.h3, is found by only 0.1 to 0.4 percent of players at every band, and we do not read that as a failure. At +0.40 against +0.39 it is a tie with 4.cxd5, so nobody is choosing wrongly. What the data shows is a choice of system that shifts with rating.

At 1000 and 1200 the likeliest move is 4.Nf3, at 22.6 and 23.6 percent, with 4.cxd5 and 4.e3 close behind at about a fifth each. From 1400 the Exchange takes over: 24.7 percent at 1400, 30.5 at 1600, 36.6 at 1800 and 46.4 at 2200. Meanwhile 4.e3, a quiet move that scores +0.20, drops from 20.0 percent at 1000 to 6.2 at 2200. And 4.c5, the only common move that hands Black a clear edge at -0.39, is 7.0 percent at 1000 and leaves the top five by 1600.

Read this as a ladder. Beginners meet development moves, strong players meet the Exchange. If you play the Grunfeld at 1000 you will see a wide range of fourth moves, and at 2200 you will see 4.cxd5 almost half the time. Our chess openings by rating dataset uses the same method for other openings.

The Exchange: the position that decides the opening

After 4.cxd5 Nxd5 the second table applies. Stockfish has 5.Nf3 and 5.e4 tied at +0.34, with 5.h3 close behind at +0.32. The move to note is 5.Nxd5, which scores +0.00 in the dataset. It gives up about a third of a pawn of White's edge and lets Black recapture with the queen into an equal game.

This is the headline of the page. The engine's best moves are tied, and 5.e4 is the likeliest choice at every band, so there is no gap at the top. The gap is in the second row of the story: 5.Nxd5 is 35.4 percent at 1000, nearly as common as 5.e4 itself, then 28.3 at 1200, 20.7 at 1400, 13.5 at 1600, 7.5 at 1800 and 3.3 at 2000. Below 1400, one White player in five to one in three makes this trade, and it hands Black an equal game.

It is a small error, not a blunder. Equal is a long way from lost, and a 1000 rated player will not win or lose the game on this move alone. But it is the clearest rating-linked slip in the data, and it matters for you either way. If you play Black at 1400 or below and the game reaches this position, expect 5.Nxd5 in roughly one game in five to one in three, and know the position is comfortable. If you play White, 5.e4 is both the likeliest move and tied for best, so you lose nothing by learning it.

5.e4 itself climbs from 40.2 percent at 1000 to 81.6 at 2000, then dips to 78.4 at 2200 as 5.Bd2 rises to 8.6. That is also the move where the Grunfeld begins in earnest.

After 5.e4: trade on c3, then hit the centre

Black's main reply to 5.e4 is 5...Nxc3 6.bxc3, trading the knight. Our local Stockfish check shows what happens otherwise. After 5...Nb6, White is at +1.23 at depth 23, and after 5...Nf6 it is +1.53 at depth 23. Both retreats waste the point of the opening, since White's centre has been built for free, and both are over a full pawn for White. Of the lines we checked, this is the one where a natural looking move is a real mistake.

After 6.bxc3 Bg7, Black attacks the centre with ...c5, often followed by ...Qa5, ...cxd4, ...Bg4 and ...Nc6. Our check of the main position scores +0.41 (White slightly better) at depth 25, with 7.Bc4 as the engine's top move and 7.Nf3 at +0.26.

How White develops here has changed. For decades theory held that Bc4 and Ne2 was the correct method, and early Nf3 was thought weak because of ...Bg4 pressure. In the late 1970s Karpov, Kasparov and others found different methods, such as an early Rb1 to clear the long diagonal and the setup of Be3, Qd2 and Rc1. We describe these lines by their moves, since the popular labels for them are not consistent between sources.

• The 7.Nf3 lines. After 7.Nf3 c5 8.Rb1 O-O 9.Be2 the best reply is 9...cxd4 at +0.19. The alternatives are 9...Bg4 at +0.27 and 9...Nc6 at +0.37. After 7.Nf3 c5 8.Be3 Qa5 9.Qd2, the best move is 9...Nc6 at +0.08 (White barely ahead), which is about as equal as a position gets, while 9...cxd4 is +0.25.
• The older 7.Bc4 and Ne2 setup. After 7.Bc4 c5 8.Ne2 Nc6 9.Be3 O-O, White is at +0.28 with 10.O-O. Some sharper branches of this setup, such as the Seville Variation, run to a forcing Bxf7+ sequence; we did not engine check those.

The lesson is that Black's counterplay is real. In both families the evaluation stays below half a pawn, and in the Qa5 line it is nearly zero. That is the Grunfeld bargain: White gets a centre and a small initiative, Black gets targets.

The anti-Exchange lines: Russian, Bf4 and Bg5

As of October 2026, chess.com notes the Exchange has a good reputation for Black, so White sometimes sidesteps it. Three choices come up.

• The Russian System, 4.Nf3 Bg7 5.Qb3. White practically forces ...dxc4, and after 5...dxc4 6.Qxc4 O-O 7.e4 our check gives 7...a6 as Black's best, at +0.22 at depth 23. 7...Nc6 is next at +0.27. 7...Be6 is the least precise of the three at +0.52. The queen is often exposed later, and Black's usual seventh moves include ...a6, ...Bg4, ...Na6, ...Nc6 and ...c6.
• 4.Bf4, the Brinckmann Attack. Considered a safer continuation for White, with the main line 4...Bg7 5.e3 c5 6.dxc5 Qa5. It is not often seen in top level play, its use having declined since the 1930s. One sharp line is 5...O-O 6.cxd5 Nxd5 7.Nxd5 Qxd5 8.Bxc7, a pawn grab. Our check says Black's best is 8...Na6 at +0.32, so White is a pawn up but Black has enough play that the engine's edge for White stays small. 8...Nc6 is +0.50 and 8...Bf5 is +0.63.
• 4.Bg5. The naming is disputed, so we give the moves. After 4.Bg5 Ne4 5.Bh4 Nxc3 6.bxc3 dxc4, the position scores +0.10 for White at depth 24, which is nearly equal and fine for Black.

White can also skip 3.Nc3 with 3.Nf3, 3.f3 or 3.g3. If Black still plays ...d5 these are Neo-Grunfelds. The Kemeri Variation is 1.d4 Nf6 2.c4 g6 3.g3 d5. We have no data on them, and a rating split for them is one of the things we did not obtain.

What the numbers say about how to play it

Put the two tables together and the practical advice follows. At 1000 to 1200, you meet a mixed set of fourth moves, and your most likely bad news is 5.Nxd5, which is good news for you. At 1400 and up, 4.cxd5 and 5.e4 become the main road, and the work in the opening is the 6.bxc3 Bg7 position and the c5 break. At 2000 and 2200, almost everybody plays the Exchange, so a Grunfeld player at that level is mostly a player of that one structure.

That is also the honest case against it for beginners. The structure after 5.e4 asks for precise play: retreat the knight and you are over a pawn down by the engine's count, and each of the Exchange lines above has a different best move for Black. In our view the King's Indian is a more forgiving place to start, see the King's Indian Defense page, and the Queen's Gambit family is the other main road, see the Queen's Gambit page. If you like unbalanced play against 1.d4 built around a pawn sacrifice, the Benko Gambit page is the other contender. As of October 2026, chess.com puts the Grunfeld at a 36 percent draw rate in the Exchange and 4.Nf3 lines, against White 37 and Black 27, with overall scores rather than rating splits.

For learning, a plan beats a move list here. Black's plan is the same in every line: let White build the centre, trade the c3 knight, then pressure d4 with ...c5, ...Bg7 and often ...Qa5. That is the argument in why you should stop memorizing openings and learn plans.

Is the Grunfeld a good opening?

Yes, in the narrow sense that Black is fine in every line we checked where Black plays the main move. Leaving aside the two knight retreats after 5.e4, the largest White edge was +0.41 (White slightly better), and several lines fall to +0.08 to +0.28. None is a refutation, and none of these numbers is a winning edge for either side. That fits what chess.com reports as of October 2026: the Grunfeld is safer than the King's Indian, with more draws and fewer losses.

The real cost is the study load. FM Carsten Hansen, in a 2009 remark quoted on chess.com in 2018, called it mildly bizarre to see players below 1500 study it as Black, and a forum poster on the same 2018 thread, rated about 1100, said it was really difficult to understand. Others on the same thread list the high level of theory and long forcing lines. A lichess poster counters that you can play it without being strong and enjoy it. Both are fair, and we cannot settle it from engine numbers. The data does say the early stages are forgiving at low ratings, because White's most common mistake is the equalising trade.

Where other resources are better

This page is narrow on purpose. The dataset holds two positions, and the line checks are quick local runs, not a substitute for an opening database or a repertoire course. If you want to play the Grunfeld seriously, Boris Avrukh's two volume Grunfeld Defense from Quality Chess is over 600 pages and aimed at tournament players, which is the right depth for a repertoire. We have no game results by rating, so we cannot say how Black scores at your level. Wikipedia is the better reference for the full list of named variations and history, and chess.com is better for overall scores. None of the pages we opened splits White's choices after 3...d5 by rating, which is the gap this one fills.

What to take from it

The engine sees 4.h3, 4.cxd5 and 4.Nf3 as tied, so the interesting story is system choice: 4.Nf3 leads at 1000 and 1200, and 4.cxd5 takes over from 1400, reaching 46.4 percent at 2200. After 4.cxd5 Nxd5, 5.e4 and 5.Nf3 tie at +0.34, but 5.Nxd5 at +0.00 is chosen 35.4 percent of the time at 1000 and 3.3 at 2000. As Black, trade on c3 after 5.e4 rather than retreating the knight to b6 or f6, and aim at d4. Maia3 is a model of human choice from the maia3-5m checkpoint, not a count of real games, and every percentage above should be read that way.