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Pawn structure
In a game of chess, the pawn structure (sometimes known as the pawn skeleton) is the configuration of pawns on the chessboard. Because pawns are the least mobile of the chess pieces, the pawn structure is relatively static and thus plays a large role in determining the strategic character of the position.
Weaknesses in the pawn structure, such as isolated, doubled, or backward pawns and holes, once created, are usually permanent. Care must therefore be taken to avoid them (but there are exceptions—for instance see Boleslavsky hole below). In the absence of these structural weaknesses, it is not possible to assess a pawn formation as good or bad—much depends on the position of the pieces. The pawn formation does determine the overall strategies of the players to a large extent, however, even if arising from unrelated openings. Pawn formations symmetrical about a vertical line (such as the e5-chain and the d5-chain) may appear similar, but they tend to have entirely different characteristics because of the propensity of the kings to castle on the kingside.
Pawn structures often transpose into one another, such as the isolani into the hanging pawns, and vice versa. Such transpositions must be considered carefully and often mark shifts in game strategy.
In his 1995 book Pawn Structure Chess, Andrew Soltis classified the major pawn formations into 17 categories. In 2015, the book Chess Structures, by Mauricio Flores Rios, further studied the subject, subdividing pawn structures into the 28 most important. For a formation to fall into a particular category, it need not have a pawn position identical to the corresponding diagram, but only close enough that the character of the game and the major themes are unchanged. It is typically the center pawns whose position influences the nature of the game the most.
Structures with mutually attacking pawns are said to have tension. They are ordinarily unstable and tend to transpose into a stable formation with a pawn push or exchange. Play often revolves around making the transposition happen under favorable circumstances. For instance, in the Queen's Gambit Declined, Black waits until White develops the king's bishop to make the d5xc4 capture, transposing to the Slav formation (see below).
Openings: Primary: Caro–Kann. Other: French, Scandinavian (in the main line where White has to get the queen back from a5), Trompowsky (colors reversed), Alekhine's.
Character: Slow-paced game.
Themes for White: Outpost on e5, kingside space advantage, d4–d5 break, possibility of queenside majority in the endgame (typically after the exchange of White's d-pawn for Black's c-pawn).
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Pawn structure
In a game of chess, the pawn structure (sometimes known as the pawn skeleton) is the configuration of pawns on the chessboard. Because pawns are the least mobile of the chess pieces, the pawn structure is relatively static and thus plays a large role in determining the strategic character of the position.
Weaknesses in the pawn structure, such as isolated, doubled, or backward pawns and holes, once created, are usually permanent. Care must therefore be taken to avoid them (but there are exceptions—for instance see Boleslavsky hole below). In the absence of these structural weaknesses, it is not possible to assess a pawn formation as good or bad—much depends on the position of the pieces. The pawn formation does determine the overall strategies of the players to a large extent, however, even if arising from unrelated openings. Pawn formations symmetrical about a vertical line (such as the e5-chain and the d5-chain) may appear similar, but they tend to have entirely different characteristics because of the propensity of the kings to castle on the kingside.
Pawn structures often transpose into one another, such as the isolani into the hanging pawns, and vice versa. Such transpositions must be considered carefully and often mark shifts in game strategy.
In his 1995 book Pawn Structure Chess, Andrew Soltis classified the major pawn formations into 17 categories. In 2015, the book Chess Structures, by Mauricio Flores Rios, further studied the subject, subdividing pawn structures into the 28 most important. For a formation to fall into a particular category, it need not have a pawn position identical to the corresponding diagram, but only close enough that the character of the game and the major themes are unchanged. It is typically the center pawns whose position influences the nature of the game the most.
Structures with mutually attacking pawns are said to have tension. They are ordinarily unstable and tend to transpose into a stable formation with a pawn push or exchange. Play often revolves around making the transposition happen under favorable circumstances. For instance, in the Queen's Gambit Declined, Black waits until White develops the king's bishop to make the d5xc4 capture, transposing to the Slav formation (see below).
Openings: Primary: Caro–Kann. Other: French, Scandinavian (in the main line where White has to get the queen back from a5), Trompowsky (colors reversed), Alekhine's.
Character: Slow-paced game.
Themes for White: Outpost on e5, kingside space advantage, d4–d5 break, possibility of queenside majority in the endgame (typically after the exchange of White's d-pawn for Black's c-pawn).