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94-476: The French Defence is a chess opening characterised by the moves: This is most commonly followed by 2.d4 d5. Black usually plays ...c5 soon after, attacking White's pawn centre and gaining space on the queenside . The French has a reputation for solidity and resilience, although some lines such as the Winawer Variation can lead to sharp complications. Black's position

188-401: A Queen's Pawn Game after 1.d4 e6 2.e4 d5 or the declining of a Blackmar–Diemer Gambit after 1.d4 d5 2.e4 e6. White's options include defending the e4-pawn with 3.Nc3 or 3.Nd2, advancing it with 3.e5, or exchanging it with 3.exd5, each of which leads to different types of positions. Defending the pawn with 3.Bd3 allows 3...dxe4 4.Bxe4 Nf6, when Black gains either a tempo or the advantage of

282-402: A better position when playing as White and to equalize when playing as Black. The idea behind this is that playing first gives White a slight initial advantage ; for example, White will be the first to attack if the game opens symmetrically (Black mirrors White's moves). Since about the 1950s another objective has gradually become more dominant. According to IM Jeremy Silman , the purpose of

376-408: A bishop). The oldest openings in chess follow 1.e4. Bobby Fischer rated 1.e4 as "Best by test." On the downside, 1.e4 places a pawn on an undefended square and weakens d4 and f4. If Black mirrors White's move and replies with 1...e5, the result is an open game. The most popular second move for White is 2.Nf3 attacking Black's king pawn, preparing for a kingside castle, and anticipating the advance of

470-540: A bit, but they only address center control peripherally and are slower than the more popular openings. The eleven remaining possibilities are rarely played at the top levels of chess. Of these, the best are merely slow such as 1.c3, 1.d3, and 1.e3. Worse possibilities either ignore the center and development such as 1.a3, weaken White's position (for instance, 1.f3 and 1.g4), or place the knights on poor squares (1.Na3 and 1.Nh3). Black has twenty complementary responses to White's opening move. Many of these are mirror images of

564-602: A branching point: There are alternative strategies to 3...c5 that were tried in the early 20th century such as 3...b6, intending to fianchetto the bad bishop and which can transpose to Owen's Defence . Also possible is 4...Qb6 5.Nf3 Bd7 intending 6...Bb5 to trade off the "bad" queen's bishop. Playing 3...Nc6 is a misguided attempt to reach the Hecht Reefschlager Variation or the Guimard Variation. Many players who begin with 1.e4 find that

658-420: A different move order: 3.Nd2 dxe4. White has freer development and more space in the centre, which Black intends to neutralise by playing ...c7–c5 at some point. This solid line has undergone a modest revival, featuring in many grandmaster (GM) games as a drawing weapon but theory still gives White a slight edge. After 3...dxe4 4.Nxe4, Black has the following options: 3...Nc6 is the Hecht Reefschlager Variation,

752-399: A large center with the goal of attacking it with pieces. Other semi-open games have been studied but are less common; see Semi-Open Game for details. The openings classified as closed games begin 1.d4 d5. The move 1.d4 offers the same benefits to development and center control as does 1.e4, but unlike with King Pawn openings where the e4-pawn is undefended after the first move, the d4-pawn

846-478: A name coined by John Watson . This sideline has been played by Aron Nimzowitsch and many other players. One rare sideline after 3.Nc3 is 3...c6, which is known as the Paulsen Variation, after Louis Paulsen . It can also be reached via a Caro–Kann Defence move order (1.e4 c6 2.d4 d5 3.Nc3 e6). The Tarrasch Variation is named after Siegbert Tarrasch . This move became particularly popular during

940-738: A normal Sicilian Defence , and 3.c3, transposing into a line of the Alapin Sicilian (usually arrived at after 1.e4 c5 2.c3 e6 3.d4) are also common. Play may also lead back to the French; for example, 1.e4 e6 2.d4 c5 3.c3 d5 4.e5 transposes into the Advance Variation . Another move is 2...b6, which transposes into Owen's Defence or the English Defence . Also possible is 2...f5, the Franco-Hiva Gambit, but this

1034-427: A piece attack, White may play for the advance of the kingside pawns (an especially common idea in the endgame), which usually involves f2–f4, g2–g4 and then f4–f5 to use the spatial advantage on that side of the board. A white pawn on f5 can be very strong as it may threaten to capture on e6 or advance to f6. Sometimes pushing the h-pawn to h5 or h6 may also be effective. A modern idea is for White to gain space on

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1128-588: A player has specialized in is called an opening repertoire. The main elements a player needs to consider in a repertoire are: A very narrow repertoire allows for deeper specialization but also makes a player less flexible to vary against different opponents. In addition, opponents may find it easier to prepare against a player with a narrow repertoire. The main openings in a repertoire are usually reasonably sound; that is, they should lead to playable positions even against optimal counterplay. Unsound gambits are sometimes used as surprise weapons, but are unreliable for

1222-657: A position resembling those arising from the Rubinstein Variation. However, here Black has the bishop pair, with greater dynamic chances (although White's knight is well placed on e4), so this line is more popular than the Rubinstein and has long been a favourite of Evgeny Bareev . Black can also try 5...Be7 6.Bxf6 gxf6, as played by Alexander Morozevich and Gregory Kaidanov ; by following up with ...f5 and ...Bf6, Black obtains active piece play in return for his shattered pawn structure. Another line that resembles

1316-523: A stable repertoire. Repertoires often change as a player develops, and a player's advancement may be stifled if the opening repertoire does not evolve. Some openings that are effective against amateur players are less effective at the master level. For example, Black obtains active play in return for a pawn in the Benko Gambit ; amateur players may have trouble defending against Black's activity, while masters are more skilled at defending and making use of

1410-601: A well-prepared opponent playing Black can equalize fairly easily. The Stonewall is characterized by the White pawn formation on c3, d4, e3, and f4, and can be achieved by several move orders and against many different Black setups. The diagram positions and the move sequences given below are typical. Other closed openings have been studied but are less common; see Closed Game for details. The Indian systems are asymmetrical defenses to 1.d4 that employ hypermodern chess strategy. Fianchettos are common in many of these openings. As with

1504-576: Is 2.c4, grabbing a larger share of the center and allowing the move Nc3, to prepare for moving the e-pawn to e4 without blocking the c-pawn. Black's most popular replies are: Advocated by Nimzowitsch as early as 1913, the Nimzo-Indian Defense was the first of the Indian systems to gain full acceptance. It remains one of the most popular and well-respected defenses to 1.d4 and White often adopts move orders designed to avoid it. Black attacks

1598-399: Is 3...Nc6 !? 4.Nf3 Nf6 with the idea of 5.e5 Ne4; German IM Helmut Reefschlaeger has been fond of this move. It is incredibly dense in theory. This variation, named after Szymon Winawer and pioneered by Nimzowitsch and Botvinnik, is one of the main systems in the French, due chiefly to the latter's efforts in the 1940s, becoming the most often seen rejoinder to 3.Nc3, though in the 1980s,

1692-503: Is 8.Nxd4 Bc5 9. Qd2 Bxd4 10.Bxd4 Nxd4 11. Qxd4 Qb6 12.Qxb6 Nxb6, This line has been referred to as the Vacuum Cleaner Variation. In these lines, White has the option of playing either Qd2 and 0-0-0, or Be2 and 0-0, with the former typically leading to sharper positions due to opposite-side castling when Black castles kingside in both cases. This variation is named after Akiba Rubinstein and can also arise from

1786-514: Is another major system in the French. This position was seen as so normal so no-one thought about claiming it. White can continue with the following options: White threatens 5.e5, attacking the pinned knight. Black has a number of ways to meet this threat. Named after Amos Burn , the Burn Variation is the most common reply at the top level. 4...dxe4 5.Nxe4 and usually there now follows: 5...Be7 6.Bxf6 Bxf6 7.Nf3 Nd7 or 7...0-0, resulting in

1880-448: Is characterized by White playing 1.Nf3, fianchettoing one or both bishops, and not playing an early d4 (which would generally transpose into one of the 1.d4 openings). The King's Indian Attack (KIA) is a system of development that White may use in reply to almost any Black opening moves. The characteristic KIA setup is 1.Nf3, 2.g3, 3.Bg2, 4.0-0, 5.d3, 6.Nbd2, and 7.e4, although these moves may be played in many different orders. In fact,

1974-493: Is common to divide each of them further. One reasonable way to group the openings is: The Indian systems (1.d4 Nf6) are the most important of the Semi-Closed Games, and warrant separate treatment. White starts by playing 1.e4 (moving their king pawn two spaces). This is the most popular opening move and it has many strengths—it immediately works on controlling the center, and it activates two pieces (the queen and

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2068-539: Is considered solid, safe, and perhaps somewhat drawish . Black often chooses the Queen's Indian when White avoids the Nimzo-Indian by playing 3.Nf3 instead of 3.Nc3. Black constructs a sound position that makes no positional concessions, although sometimes it is difficult for Black to obtain good winning chances. Karpov was a leading expert in this opening. The Modern Benoni is a risky attempt by Black to unbalance

2162-417: Is cramping Black's position. In the unlikely case that the flank attack ...c7–c5 is insufficient to achieve counterplay, Black can also try ...f7–f6. In many positions, White may support the pawn on e5 by playing f2–f4, with ideas of f4–f5, but the primary drawback to the advance of the f-pawn is opening of the g1–a7 diagonal, which is particularly significant due to the black queen's oft-found position on b6 and

2256-619: Is named after the Catalonia region. Chess players' names are the most common sources of opening names. The name given to an opening is not always that of the first player to adopt it; often an opening is named for the player who was the first to popularize it or to publish analysis of it. Eponymic openings include the Ruy Lopez , Alekhine's Defense , Morphy Defense , and the Réti Opening . Some opening names honor two people, such as

2350-467: Is now readily answered by 4.c3. On the other hand, 3.Nd2 develops the knight to an arguably less active square than 3.Nc3, and in addition, it hems in White's dark-square bishop. Hence, White will typically have to spend an extra tempo moving the knight from d2 at some point before developing said bishop. The main line of the Advance Variation continues 3...c5 4.c3 Nc6 5.Nf3 and then we have

2444-485: Is often somewhat cramped in the early game; in particular, the pawn on e6 can impede the development of the bishop on c8. Following the opening moves 1.e4 e6, the main line of the French Defence continues 2.d4 d5 (see below for alternatives). White sets up a pawn centre , which Black immediately challenges by attacking the pawn on e4. The same position can be reached by transposition from

2538-587: Is protected by White's queen. This slight difference has a tremendous effect on the opening. For instance, whereas the King's Gambit is rarely played today at the highest levels of chess, the Queen's Gambit remains a popular weapon at all levels of play. Also, compared with the King Pawn openings, transpositions among variations are more common and critical in the closed games. The most important closed openings are in

2632-454: Is regarded as dubious. The French Defence is named after a match played by correspondence between the cities of London and Paris in 1834 (although earlier examples of games with the opening do exist). It was Jacques Chamouillet , one of the players of the Paris team, who persuaded the others to adopt this defence. As a reply to 1.e4, the French Defence received relatively little attention in

2726-480: Is somewhat inflexible because it blocks White's c-pawn; also, after 1...d5 the knight is liable to be driven to an inferior square by ...d4. (Note that after 1.Nf3 the analogous 1...e5? loses a pawn.) Bird's Opening , 1.f4, addresses center control but not development and weakens the king position slightly. The Sokolsky Opening 1.b4 and the King's and Queen's fianchettos : Larsen's Opening 1.b3 and 1.g3 aid development

2820-606: Is still played occasionally at the top level by Short and others. Another fairly common opening is the Benoni Defense , which may become very wild if it develops into the Modern Benoni , though other variations are more solid. Several other uncommon semi-closed openings have been named and studied, see Semi-Closed Game for details. The flank openings are the group of White openings typified by play on one or both flanks. White plays in hypermodern style, attacking

2914-505: Is unclear, but most likely Black would be considered "comfortable" here. The purpose behind 7.a4 is threefold: it prepares Bc1–a3, taking advantage of the absence of Black's dark-square bishop. It also prevents Black from playing ...Qa5–a4 or ...Bd7–a4 attacking c2, and if Black plays ...b6 (followed by ...Ba6 to trade off the bad bishop), White may play a5 to attack the b6-pawn. World Champions Vasily Smyslov and Bobby Fischer both used this line with success. White also has 7.h4, which has

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3008-462: Is usually done by transpositions , in which a game that apparently starts with one opening can reach a position that is normally produced by a different opening. Most players realize after a while that they play certain types of positions better than others, and that the amount of theory they can learn is limited. Therefore, most players specialize in certain openings where they know the theory and that lead to positions they favor. The set of openings

3102-431: Is why, for many years, the classical lines fell out of favour, and 3...Bb4 began to be seen more frequently after World War I , owing to the efforts of Nimzowitsch and Botvinnik . In Tarrasch–Teichmann, White won after 41 moves. In order to avoid this fate, Black usually makes it a priority early in the game to find a useful post for the bishop. Black can play ...Bd7–a4 to attack a pawn on c2, which occurs in many lines of

3196-507: The Encyclopaedia of Chess Openings . Although these codes are invaluable for the serious study of the chess opening, they are not very practical for a broad survey of the chess opening as the codes obscure common structural features between related openings. A simple descriptive categorization of the chess opening is King's Pawn Openings , Queen's Pawn Openings , and Others. Since these categories are still individually very large, it

3290-745: The Alekhine and the Scandinavian have made occasional appearances in World Chess Championship games. The Sicilian and French Defenses lead to unbalanced positions that can offer exciting play with both sides having chances to win. The Caro–Kann Defense is solid as Black intends to use their c-pawn to support their center (1.e4 c6 2.d4 d5). Alekhine's, the Pirc and the Modern are hypermodern openings in which Black tempts White to build

3384-597: The Caro–Kann and the Smith–Morra . A few opening names are purely descriptive, such as Giuoco Piano ( Italian : quiet game ), Two Knights Defense , Four Knights Game and Bishop's Opening . Some openings have been given fanciful names, often names of animals. This practice became more common in the 20th century. By then, most of the more common and traditional sequences of opening moves had already been named, so these tend to be unusual or recently developed openings like

3478-697: The Orangutan , Hippopotamus, Elephant, Hedgehog, and, most recently, the Cow. A few are given humorous names, such as the Monkey's Bum and the Toilet Variation . Opening names usually include one of the terms "opening", "variation", "defense", "gambit" etc, however the terminology is inconsistent and imprecise, and is not a useful basis for classification. Broadly, these terms are used as follows: Chess openings are primarily categorized by move sequences. In

3572-473: The Petroff . Conversely, if White declines to do this, Black may play ...c7–c5 himself, e.g. 4.Bd3 c5, as in the above-cited Tatai–Korchnoi game. If c2–c4 is not played, White and Black have two main piece setups. White may put his pieces on Nf3, Bd3, Bg5 (pinning the black knight), Nc3, Qd2 or the queen's knight can go to d2 instead and White can support the centre with c3 and perhaps play Qb3. Conversely, when

3666-618: The Queen's Gambit Declined ). Although 2...d5 is the most consistent move after 1.e4 e6 2.d4, Black occasionally plays other moves. Chief among them is 2...c5, the Franco-Benoni Defence , so-called because it features the ...c7–c5 push characteristic of the Benoni Defence . White may continue 3.d5, when play can transpose into the Benoni, though White has extra options since c2–c4 is not mandated. 3.Nf3, transposing into

3760-419: The Ruy Lopez or Spanish Opening . Opening theory was studied more scientifically from the 1840s on, and many opening variations were discovered and named in this period and later. Opening nomenclature developed haphazardly, and most names are historical accidents not based on systematic principles. In the early 1930s, the nascent FIDE embarked on a project to standardize opening nomenclature, culminating in

3854-663: The Vienna Game (2.Nc3), the Bishop's Opening (2.Bc4), and the King's Gambit (2.f4). These openings have some similarities with each other, in particular the Bishop's Opening frequently transposes to variations of the Vienna Game. The King's Gambit was extremely popular in the 19th century. White sacrifices a pawn for quick development and to divert a black pawn from the center. The Vienna Game also frequently features attacks on

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3948-447: The middlegame may also be carried out in the opening. These include preparing pawn breaks to create counterplay, creating weaknesses in the opponent's pawn structure, seizing control of key squares, making favorable exchanges of minor pieces (e.g. gaining the bishop pair), or gaining a space advantage, whether in the center or on the flanks. At higher levels of competition, for many years the main objectives of opening play were to obtain

4042-433: The 1970s and early 1980s when Anatoly Karpov used it to great effect. Though less aggressive than the alternate 3.Nc3, it is still used by top-level players seeking a small, safe advantage. Like 3.Nc3, 3.Nd2 protects e4, but is different in several key respects: it does not block White's c-pawn from advancing, which means he can play c3 at some point to support his d4-pawn. Hence, it avoids the Winawer Variation as 3...Bb4

4136-592: The Black center by means of a f2–f4 pawn advance. In the Center Game (2.d4) White immediately opens the center but if the pawn is to be recovered after 2...exd4, White must contend with a slightly premature queen development after 3.Qxd4. An alternative is to sacrifice one or two pawns, for example in the Danish Gambit . Many other variations after 1.e4 e5 have been studied; see Open Game for details. In

4230-609: The Catalan System. The most important Indian Defenses are listed below, but many others have been studied and played; see Indian Defense for details. Of the defenses to 1.d4 other than 1...d5 and 1...Nf6, the most important are the Dutch Defense and the Benoni Defense . The Dutch, an aggressive defense adopted for a time by World Champions Alekhine and Botvinnik , and played by both Botvinnik and challenger David Bronstein in their 1951 world championship match ,

4324-507: The Classical Variation with 3...Nf6 began a revival, and has since become more popular. 3...Bb4 pins the knight on c3, forcing White to resolve the central tension. White normally clarifies the central situation for the moment with 4.e5, gaining space and hoping to show that Black's b4-bishop is misplaced. The main line then is: 4...c5 5.a3 Bxc3+ 6.bxc3, resulting in the diagrammed position. While White has doubled pawns on

4418-481: The French Defence is the most difficult opening for them to play against due to the closed structure and unique strategies of the system. Thus, many players choose to play the Exchange so that the position becomes simpler and more clearcut. White makes no effort to exploit the advantage of the first move, and has often chosen this line with expectation of an early draw, and indeed draws often occur if neither side breaks

4512-748: The KIA is probably most often reached after 1.e4 when White uses it to respond to a Black attempt to play one of the semi-open games such as the Caro–Kann, French, or Sicilian, or even the open games which usually come after 1.e4 e5. Its greatest appeal may be that by adopting a set pattern of development, White can avoid the large amount of opening study required to prepare to meet the many different possible Black replies to 1.e4. Glossary of chess#queen's bishop This glossary of chess explains commonly used terms in chess , in alphabetical order. Some of these terms have their own pages, like fork and pin . For

4606-699: The Mega Database 2007, in 2006, 1...e6 was second only to the Sicilian in popularity. Historically important contributors to the theory of the defence include Mikhail Botvinnik , Viktor Korchnoi , Akiba Rubinstein , Aron Nimzowitsch , Tigran Petrosian , Lev Psakhis , Wolfgang Uhlmann and Rafael Vaganian . More recently, its leading practitioners include Evgeny Bareev , Alexey Dreev , Mikhail Gurevich , Alexander Khalifman , Smbat Lputian , Alexander Morozevich , Teimour Radjabov , Nigel Short , Gata Kamsky , and Yury Shulman . The Exchange Variation

4700-439: The Queen's Gambit family (White plays 2.c4). The Queen's Gambit is somewhat misnamed, since White can always regain the offered pawn if desired. In the Queen's Gambit Accepted , Black plays ...dxc4, giving up the center for free development and the chance to try to give White an isolated queen pawn with a subsequent ...c5 and ...cxd4. White will get active pieces and possibilities for the attack. Black has two popular ways to decline

4794-493: The Queen's Gambit other than 2...dxc4, 2...c6, and 2...e6 are uncommon. The Colle System and Stonewall Attack are classified as Queen's Pawn Games because White plays d4 but not c4. They are also examples of Systems , rather than specific opening variations. White develops aiming for a particular formation without great concern over how Black chooses to defend. Both systems are popular with club players because they are easy to learn, but are rarely used by professionals because

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4888-593: The Rubinstein is 5...Nbd7 6.Nf3 Be7 (6...h6 is also tried) 7.Nxf6+ Bxf6. Named after Wilhelm Steinitz , the Steinitz Variation continues with 4.e5 Nfd7. Here 5.Nce2, the Shirov – Anand Variation, prepares to bolster the white pawn centre with c2–c3 and f2–f4; while 5.Nf3 transposes to a position also reached via the Two Knights Variation (2.Nf3 d5 3.Nc3 Nf6 4.e5 Nfd7 5.d4). The main line of

4982-548: The Sicilian Defense. Professional chess players spend years studying openings, and they continue doing so throughout their careers as opening theory continues to evolve. Players at the club level also study openings, but the importance of the opening phase is less there since games are rarely decided in the opening. The study of openings can become unbalanced if it is to the exclusion of tactical training and middlegame and endgame strategy. A new sequence of moves in

5076-523: The Steinitz is 5.f4 c5 6.Nf3 Nc6 7.Be3. (Instead 7.Ne2 transposes to the Shirov–Anand Variation, while 7.Be2 ? cxd4 8.Nxd4 Ndxe5! 9.fxe5 Qh4+ wins a pawn for Black.) Here Black may step up the pressure on d4 by playing 7...Qb6 or 7...cxd4 8.Nxd4 Qb6, begin queenside play with 7...a6 8.Qd2 b5, or continue kingside development by playing 7...Be7 or 7...cxd4 8.Nxd4 Bc5. Another side-line for 7...cxd4

5170-767: The Winawer Variation. If Black's f-pawn has moved to f6, then Black may also consider bringing the bishop to g6 or h5 via d7 and e8. If White's light-square bishop is on the f1–a6 diagonal, Black can try to exchange it by playing ...b6 and ...Ba6, or ...Qb6 followed by ...Bd7–b5. Played in over 40% of all games after 1.e4 e6 2.d4 d5, 3.Nc3 is the most commonly seen line against the French. Black has three main options, 3...Bb4 (the Winawer Variation ), 3...Nf6 (the Classical Variation ), and 3...dxe4 (the Rubinstein Variation ). An eccentric idea

5264-506: The center from the flanks with pieces rather than occupying it with pawns. These openings are played often, and 1.Nf3 and 1.c4 trail only 1.e4 and 1.d4 in popularity as opening moves. If White opens with 1.Nf3, the game often becomes one of the d4 openings (closed games or semi-closed games) by a different move order (this is called transposition ), but unique openings such as the Réti and King's Indian Attack are also common. The Réti itself

5358-524: The center with pieces and is prepared to trade a bishop for a knight to weaken White's queenside with doubled pawns . The King's Indian Defense is aggressive, somewhat risky, and generally indicates that Black will not be satisfied with a draw. Although it was played occasionally as early as the late 19th century, the King's Indian was considered inferior until the 1940s, when it was taken up by Bronstein , Boleslavsky , and Reshevsky . Despite being Fischer 's favored defense to 1.d4, its popularity faded in

5452-485: The centre of the board after ...Bxc5. White usually tries to exploit the extra space on the kingside , often playing for a mating attack. White tries to do this in the Alekhine –Chatard Attack, for example. Another example is the following line of the Classical French: 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.Bxe7 Qxe7 7.f4 0-0 8.Nf3 c5 9.Bd3 ( diagram ). White's light-square bishop eyes

5546-508: The closed games, transpositions are important and many of the Indian defenses can be reached by several different move orders. Although Indian defenses were championed in the 1920s by players in the hypermodern school, they were not fully accepted until Soviet players showed in the late 1940s that these systems are sound for Black. Since then, Indian defenses have been the most popular Black replies to 1.d4 because they offer an unbalanced game with chances for both sides. The usual White second move

5640-472: The diagrammed position was reached after fifteen moves of a Classical French. Black's position is passive because the light-square bishop is hemmed in by pawns on a6, b5, d5, e6 and f7. White will probably try to exchange Black's knight, which is the only one of Black's pieces that has any scope. Although it might be possible for Black to hold on for a draw , it is not easy and, barring any mistakes by White, Black will have few chances to create counterplay; this

5734-476: The diagrammed position, Black most frequently plays 6...Ne7 (The main alternative is 6...Qc7, which can simply transpose to main lines after 7.Qg4 Ne7, but Black also has the option of 7.Qg4 f5 or ...f6. 6...Qa5 has recently become a popular alternative). Now White can exploit the absence of Black's dark-square bishop by playing 7.Qg4, giving Black two choices: he may sacrifice his kingside pawns with 7...Qc7 8.Qxg7 Rg8 9.Qxh7 cxd4 but destroy White's centre in return,

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5828-537: The extra pawn. Some openings played between grandmasters are so complex and theoretical that amateur players will have trouble understanding them. An example is the Perenyi Attack of the Sicilian Defense (see diagram), which yields an immensely complicated and tactical position that even strong players have difficulty handling, and that is beyond the comprehension of most amateurs. Major changes in

5922-454: The gambit pawn or return it. The Catalan Opening is characterized by White forming a pawn center at d4 and c4 and fianchettoing their king's bishop. It resembles a combination of the Queen's Gambit and Réti Opening . Since the Catalan can be reached from many different move orders, (one Queen's Gambit Declined -like move sequence is 1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.g3), it is sometimes called

6016-414: The heavy pressure on d4. In addition, many French Advance lines do not provide White with the time to play f2–f4 as it does not support the heavily pressured d4-pawn. For instance, 1.e4 e6 2.d4 d5 3.e5 c5 4.c3 Nc6 5.f4? (if White plays Nf3, f4 will come much slower) 5...Qb6 6.Nf3 Nh6! and the knight will go to f5 to place fatal pressure on d4 and dxc5 will never be an option as the white king would be stuck in

6110-414: The highest levels. It is also a popular choice at the club level due to the availability of a simple, straightforward plan involving attacking chances and extra space. The Encyclopaedia of Chess Openings includes an alphanumeric classification system for openings that is widely used in chess literature. Codes C00 to C19 are the French Defence, broken up in the following way (all apart from C00 start with

6204-435: The ideas of either pushing this pawn to h6 to cause more dark-square weaknesses in the Black kingside (if Black meets h5 with ...h6, White can play g4–g5), or getting the rook into the game via Rh3–g3. Black can also gain attacking chances in most lines: against 7.Qg4, Black will attack White's king in the centre; whereas against the other lines, Black can often gain an attack with ...0-0-0, normally combined with ...c4 to close

6298-399: The initial position, White has twenty legal moves. Of these, 1.e4, 1.d4, 1.Nf3, and 1.c4 are by far the most popular as these moves do the most to promote rapid development and control of the center. A few other opening moves are considered reasonable but less consistent with opening principles than the four most popular moves. The Dunst Opening , 1.Nc3, develops a knight to a good square, but

6392-502: The mid-1970s. Kasparov 's successes with the defense restored the King's Indian to prominence in the 1980s. Ernst Grünfeld debuted the Grünfeld Defense in 1922. Distinguished by the move 3...d5, Grünfeld intended it as an improvement to the King's Indian which was not considered entirely satisfactory at that time. The Grünfeld has been adopted by World Champions Smyslov , Fischer, and Kasparov. The Queen's Indian Defense

6486-405: The most popular first moves for White, but with one less tempo . Defenses beginning with 1...c6 and 1...e6, often followed by the center thrust 2...d5, are also popular. Defenses with an early ...d6 coupled with a kingside fianchetto are also commonly played. The most important scheme of classifying chess openings for serious players is by ECO code , a series of 500 opening codes assigned by

6580-480: The moves 1.e4 e6 2.d4 d5): Chess opening Opening moves that are considered standard are referred to as "book moves", or simply "book". When a game begins to deviate from known opening theory , the players are said to be "out of book". In some openings, book lines have been worked out for over 30 moves, such as some lines in the classical King's Indian Defense and in the Najdorf Variation of

6674-435: The nineteenth century compared to 1...e5. The first world chess champion Wilhelm Steinitz said "I have never in my life played the French Defence, which is the dullest of all openings". In the early 20th century, Géza Maróczy was perhaps the first world-class player to make it his primary weapon against 1.e4. For a long time, it was the third most popular reply to 1.e4, behind only 1...c5 and 1...e5. However, according to

6768-466: The opening is referred to as a theoretical novelty . When kept secret until used in a competitive game, it is often known as a prepared variation , a powerful weapon in top-class competition. Whether they are trying to gain the upper hand as White, or to equalize as Black or to create dynamic imbalances, players generally devote a lot of attention in the opening stages to the following strategies: Apart from these ideas, other strategies used in

6862-636: The opening is to create dynamic imbalances between the two sides, which will determine the character of the middlegame and the strategic plans chosen by both sides. For example, in the main line of the Winawer Variation of the French Defense (1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.a3 Bxc3+ 6.bxc3), White will try to use their bishop pair and space advantage to mount an attack on Black's kingside , while Black will seek simplifying exchanges (in particular, trading off one of White's bishops to blunt this advantage) and counterattack against

6956-742: The pawn, the Slav (2...c6) and the Queen's Gambit Declined (2...e6). Both of these moves lead to an immense forest of variations that can require a great deal of opening study to play well. Among the many possibilities in the Queen's Gambit Declined are the Orthodox Defense, Lasker's Defense, the Cambridge Springs Defense , the Tartakower Variation, and the Tarrasch and Semi-Tarrasch Defenses. Black replies to

7050-436: The position and gain active piece play at the cost of allowing White a pawn wedge at d5 and a central majority. Tal popularized the defense in the 1960s by winning several brilliant games with it, and Fischer occasionally adopted it, with good results, including a win in his 1972 world championship match against Boris Spassky . Often Black adopts a slightly different move order, playing 2...e6 before 3...c5 in order to avoid

7144-651: The position is for White or Black to castle on opposite sides of the board. An example of this is the line 4.Bd3 Nc6 5.c3 Bd6 6.Nf3 Bg4 7.0-0 Nge7 8.Re1 Qd7 9.Nbd2 0-0-0 . After 1.e4 e6, the main variation continues 2.d4 d5, but White can try other ideas. There are also a few rare continuations after 1.e4 e6 2.d4 d5, including 3.Bd3 (the Schlechter Variation), 3.Be3 (the Alapin Gambit), and 3.c4 (the Diemer – Duhm Gambit, which can also be reached via

7238-459: The publication of a short booklet in 1933, but this had little impact. The oldest openings tend to be named for geographic places and people. Many openings are named after nationalities of players who advocated them, for example Indian, English, Spanish, French, Dutch, Scotch, Russian, Italian, Scandinavian and Sicilian, or places where important games featuring the opening were played such as Vienna, Berlin, and Wilkes-Barre . The Catalan System

7332-606: The queen pawn to d4. Black's most common reply is 2...Nc6, which usually leads to the Ruy Lopez (3.Bb5), Scotch Game (3.d4), or Italian Game (3.Bc4). If Black instead maintains symmetry and counterattacks White's center with 2...Nf6 then the Petrov's Defense results. The Philidor Defense (2...d6) is not popular in modern chess because it allows White an easy space advantage while Black's position remains cramped and passive, although solid. Other responses to 2.Nf3 are not seen in master play. The most popular alternatives to 2.Nf3 are

7426-401: The queen's knight is on c3, the king's knight may go to e2 when the enemy bishop and knight can be kept out of the key squares e4 and g4 by f3. When the knight is on c3 in the first and last of the above strategies, White may choose either short or long castling . The positions are so symmetrical that the options and strategies are the same for both sides. Another way to unbalance

7520-415: The queenside by playing a2–a3 and b2–b4. If implemented successfully, this will further restrict Black's pieces. One of the drawbacks of the French Defence for Black is the queen's bishop , which is blocked in by the pawn on e6 and can remain passive throughout the game. An often-cited example of the potential weakness of this bishop is S. Tarrasch – R. Teichmann , San Sebastián 1912, in which

7614-417: The queenside, and then ...f6 to open up the kingside, where White's king often resides. If Black can accomplish this, White is often left without meaningful play, although ...c4 does permit White a4 followed by Ba3 if Black has not stopped this by placing a piece on a4 (for example, by Bd7–a4). 5th-move deviations for White include: 4th-move deviations for White include: Deviations for Black include: This

7708-458: The queenside, which form the basis for Black's counterplay, they can also help White since they strengthen his centre and give him a semi-open b-file. White has a spatial advantage on the kingside, where Black is even weaker than usual because he has traded off his dark-square bishop . Combined with the bishop pair, this gives White attacking chances, which he must attempt to use as the long-term features of this pawn structure favour Black. In

7802-436: The rules of chess in the late fifteenth century increased the speed of the game, consequently emphasizing the importance of opening study. Thus, early chess books, such as the 1497 text of Luis Ramirez de Lucena , present opening analysis, as do Pedro Damiano (1512) and Ruy López de Segura (1561). Ruy López's disagreement with Damiano regarding the merits of 2...Nc6 led to 3.Bb5 (after 1.e4 e5 2.Nf3 Nc6) being named for him as

7896-515: The semi-open games White plays 1.e4 and Black breaks symmetry immediately by replying with a move other than 1...e5. The most popular Black defense to 1.e4 is the Sicilian (1...c5), but the French (1...e6, normally followed by 2.d4 d5) and the Caro–Kann (1...c6, normally followed by 2.d4 d5) are also very popular. The Pirc and the Modern are closely related openings that are also often seen, while

7990-442: The sharpest lines for White. The Benko Gambit is often played by strong players, and is very popular at lower levels. Black plays to open lines on the queenside where White will be subject to considerable pressure. If White accepts the gambit, Black's compensation is positional rather than tactical, and their initiative can last even after many piece exchanges and well into the endgame . White often chooses instead either to decline

8084-401: The so-called " Poisoned Pawn Variation "; or he can play 7...0-0 8.Bd3 Nbc6, which avoids giving up material, but leaves the king on the flank where White is trying to attack. A more recent alternative is 7...Kf8, which tries to make use of the locked pawn centre (the king is safe from central attacks, and can run away from a kingside attack). Experts on the 7.Qg4 line include Judit Polgár . If

8178-713: The symmetry. An extreme example was Capablanca – Maróczy , Lake Hopatcong 1926, which went: 4.Bd3 Bd6 5.Nf3 Nf6 6.0-0 0-0 7.Bg5 Bg4 8.Re1 Nbd7 9.Nbd2 c6 10.c3 Qc7 11.Qc2 Rfe8 12.Bh4 Bh5 13.Bg3 Bxg3 14.hxg3 Bg6 15.Rxe8+ Rxe8 16.Bxg6 hxg6 17.Re1 Rxe1+ 18.Nxe1 Ne8 19.Nd3 Nd6 20.Qb3 a6 21.Kf1 ½–½ . Despite the symmetrical pawn structure, White cannot force a draw. An obsession with obtaining one sometimes results in embarrassment for White, as in Tatai– Korchnoi , Beer Sheva 1978, which continued 4.Bd3 c5!? 5.Nf3 Nc6 6.Qe2+ Be7 7.dxc5 Nf6 8.h3 0-0 9.0-0 Bxc5 10.c3 Re8 11.Qc2 Qd6 12.Nbd2 Qg3 13.Bf5 Re2 14.Nd4 Nxd4 0–1 . A less extreme example

8272-547: The tactical complications of 7.Qg4 are not to White's taste, 7.Nf3 and 7.a4 are good positional alternatives, and 7.h4 is a more aggressive attempt: 7.Nf3 is a natural developing move, and White usually follows it up by developing the king's bishop to d3 or e2 (occasionally to b5) and castling kingside. This is called the Winawer Advance Variation. This line often continues 7...Bd7 8.Bd3 c4 9.Be2 Ba4 10.0-0 Qa5 11.Bd2 Nbc6 12.Ng5 h6 13.Nh3 0-0-0. Its assessment

8366-455: The two bishops . The diagram shows a pawn structure commonly found in the French. Black has more space on the queenside, so tends to focus on that side of the board, almost always playing ...c7–c5 early on to attack White's pawn chain at its base, and may follow up by advancing the a- and b-pawns. Position after 1.e4 e6 2.d4 d5 3.e5 c5 4.c3 Nc6 5.f4 Qb6 6.Nf3 Nh6 Alternatively or simultaneously, Black will play against White's centre, which

8460-460: The weak h7-pawn, which is usually defended by a knight on f6, but here it has been pushed away by e5. If 9...cxd4 (Black does better with 9...f5 or 9...f6), White can play the Greek gift sacrifice 10.Bxh7+ Kxh7 11.Ng5+ Qxg5 ! 12.fxg5 dxc3 13.Qh5+! where Black has three minor pieces for the queen, a slight material superiority, but has a vulnerable king and White has good attacking chances. Apart from

8554-461: The weakened pawns on White's queenside ; both players accept different combinations of advantages and disadvantages. This idea was a doctrine of the Soviet school of chess . A third objective, which is complementary to the previous ones and has been common since the 19th century, is to lure the opponent into positions with which the player is more familiar and comfortable than the opponent. This

8648-580: Was Mikhail Gurevich – Nigel Short , Manila 1990 where White, a strong Russian grandmaster , played openly for the draw but was ground down by Short in 42 moves. To create genuine winning chances, White will often play c2–c4 at some stage to put pressure on Black's d5-pawn. Black can give White an isolated queen's pawn by capturing on c4, but this gives White's pieces greater freedom, which may lead to attacking chances. This occurs in lines such as 3.exd5 exd5 4.c4 (played by GMs Normunds Miezis and Maurice Ashley ) and 4.Nf3 Bd6 5.c4, which may transpose to

8742-505: Was frequently played in the early days of the French Defence. Aron Nimzowitsch believed it to be White's best choice and enriched its theory with many ideas. The Advance declined in popularity, however, throughout most of the 20th century until it was revived in the 1980s by GM and prominent opening theoretician Evgeny Sveshnikov , who continued to be a leading expert in this line. In recent years, it has become nearly as popular as 3.Nd2; GM Alexander Grischuk has championed it successfully at

8836-411: Was recommended by Howard Staunton in the 19th century, but has been in decline ever since. In the early 1990s, Garry Kasparov briefly experimented with it before switching to 3.Nc3. Black's game is made much easier as his queen's bishop has been liberated. It has the reputation of giving immediate equality to Black due to the symmetrical pawn structure. Like the Exchange, the Advance Variation

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