Openings
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Codex of Opening Systems
All 126 opening families in one catalogue: search by name, move or player, and filter by the kind of position.
Character
Key set-ups
115 families
ECO B20Article1…c5Tabiya: 5.Nc3391 linesSicilian Defense
- Semi-open games
- Sharp play
- Asymmetry
Answer not with a mirror, but with a strike from the side
Study opening- ECO C60Article3.Bb5Tabiya: 9.h3235 lines
Ruy Lopez
- Open games
- Positional play
- Classical
Pressure that is in no hurry
Study opening - ECO D06Article2.c4Tabiya: 7…b6257 lines
Queen's Gambit
- Closed games
- Positional play
Offer a pawn, build a fortress
Study opening - ECO C30Article2.f4Tabiya: 5.Ne5191 lines
King's Gambit
- Open games
- Gambits
- Sharp play
- Open centre
A pawn for speed
Study opening - ECO C001…e6Tabiya: 7.Be3212 lines
French Defense
- Semi-open games
- Solid
- Pawn chain
Chain against chain
Study opening - ECO B104…Bf5Tabiya: 7…Nd7110 lines
Caro-Kann Defense
- Semi-open games
- Solid
The bishop first, the pawn after
Study opening - ECO E616…e5Tabiya: 8…Ne7119 lines
King's Indian Defense
- Semi-closed games
- Fianchetto
- Sharp play
- Closed centre
Let White build the centre: it will become a target
Study opening - ECO E203…Bb4Tabiya: 7…Nc699 lines
Nimzo-Indian Defense
- Semi-closed games
- Positional play
- Hypermodern
A pin instead of a centre
Study opening - ECO A101.c4Tabiya: 6…Nb6175 lines
English Opening
- Flank openings
- Fianchetto
- Positional play
- Hypermodern
A centre without central pawns
Study opening - ECO C503.Bc4Tabiya: 7.Bb3187 lines
Italian Game
- Open games
- Open centre
- Classical
A quiet game with a hidden threat
Study opening - ECO D80Article3…d5Tabiya: 6…Bg759 lines
Grünfeld Defense
- Semi-closed games
- Sharp play
- Big pawn centre
- Hypermodern
Give up the centre, then take it apart
Study opening - ECO D102…c6Tabiya: 8…Nbd752 lines
Slav Defense
- Closed games
- Solid
A pawn on c6, a bishop at large
Study opening - ECO D434…e6Tabiya: 9…c570 lines
Semi-Slav Defense
- Closed games
- Sharp play
The bishop is shut in, but not for long
Study opening - ECO E123…b6Tabiya: 7…Ne473 lines
Queen's Indian Defense
- Semi-closed games
- Fianchetto
- Positional play
- Hypermodern
A bishop on b7 stares across the whole board
Study opening - ECO B00Article3…g6Tabiya: 6.O-O28 lines
Pirc Defense
- Semi-open games
- Fianchetto
- Sharp play
- Big pawn centre
Let them build a centre: we will undermine it from the wings
Study opening - ECO C41Article2…d6Tabiya: 7…c644 lines
Philidor Defense
- Open games
- Solid
A fortress around e5
Study opening - ECO B011…d5Tabiya: 7…e645 lines
Scandinavian Defense
- Semi-open games
- Solid
The queen goes first
Study opening - ECO B021…Nf6Tabiya: 8…Nb656 lines
Alekhine Defense
- Semi-open games
- Sharp play
- Big pawn centre
- Hypermodern
Let the pawns run far from home
Study opening - ECO C422…Nf6Tabiya: 7…Nc650 lines
Petrov's Defense
- Open games
- Solid
- Symmetry
A counterpunch instead of a defence
Study opening - ECO C443.d4Tabiya: 8…Nb653 lines
Scotch Game
- Open games
- Big pawn centre
- Open centre
- Classical
The centre opens on move three
Study opening - ECO A801…f5Tabiya: 6…d669 lines
Dutch Defense
- Semi-closed games
- Fianchetto
- Sharp play
- Closed centre
One pawn step, and e4 is in the fist
Study opening - ECO E003.g3Tabiya: 8…b532 lines
Catalan Opening
- Closed games
- Fianchetto
- Positional play
The queen's gambit with a bishop on g2
Study opening - ECO A092.c4Tabiya: 7…Nc643 lines
Réti Opening
- Flank openings
- Fianchetto
- Hypermodern
The centre from a distance
Study opening - ECO A565.cxd5Tabiya: 7…Bg761 lines
Benoni Defense
- Semi-closed games
- Sharp play
- Asymmetry
White gets the centre, Black gets the wing and the diagonal
Study opening - ECO C252.Nc3Tabiya: 5…Be741 lines
Vienna Game
- Open games
- Classical
Knight on c3, f-pawn at the ready
Study opening - ECO C473…Nf6Tabiya: 8…Qe749 lines
Four Knights Game
- Open games
- Solid
- Classical
- Symmetry
Four knights, no hurry
Study opening - ECO A483.Bf4Tabiya: 6…Nbd78 lines
London System
- Closed games
- Solid
- Set-up systems
One setup against almost anything
Study opening - ECO A021.f4Tabiya: 7…Nbd728 lines
Bird Opening
- Flank openings
- Sharp play
The Dutch with an extra move
Study opening - ECO B061…g6Tabiya: 6…Nd739 lines
Modern Defense
- Semi-open games
- Fianchetto
- Big pawn centre
- Hypermodern
Let them build, then take it apart
Study opening - ECO A573…b5Tabiya: 8…g624 lines
Benko Gambit
- Semi-closed games
- Gambits
- Sharp play
- Asymmetry
A pawn for open files
Study opening - ECO A001.Nh3Tabiya: 5.O-O3 lines
Amar Opening
- Flank openings
- Offbeat
A knight on the rim, and a joke that costs a pawn
Study opening - ECO A004.b3Tabiya: 4…Nf61 lines
Amsterdam Attack
- Flank openings
- Set-up systems
- Offbeat
A quiet flank set-up built on e3, c4 and b3
Study opening - ECO A001.a3Tabiya: 2.c42 lines
Anderssen's Opening
- Flank openings
- Offbeat
A move that does nothing, with a name attached
Study opening - ECO A001.f3Tabiya: 2…Nf66 lines
Barnes Opening
- Flank openings
- Offbeat
The most awkward first move there is
Study opening - ECO A001.h3Tabiya: 3.Nf32 lines
Clemenz Opening
- Flank openings
- Offbeat
A move with little to say for itself
Study opening - ECO A002.a3Tabiya: 3.c41 lines
Global Opening
- Flank openings
- Offbeat
Two rim-pawn moves and not a piece in sight
Study opening - ECO A001.g4Tabiya: 3…c620 lines
Grob Opening
- Flank openings
- Sharp play
- Offbeat
The move that gets no forgiveness
Study opening - ECO A001.g3Tabiya: 5…Be720 lines
Hungarian Opening
- Flank openings
- Fianchetto
- Positional play
- Hypermodern
The bishop on g2 before the plan
Study opening - ECO A001.h4Tabiya: 3.d49 lines
Kádas Opening
- Flank openings
- Offbeat
A rook-pawn first move and a hope of surprise
Study opening - ECO A001…h5Tabiya: 3.Bg21 lines
Lasker Simul Special
- Flank openings
- Offbeat
A rim pawn answers the fianchetto
Study opening - ECO A001.d3Tabiya: 7…Nc64 lines
Mieses Opening
- Flank openings
- Set-up systems
- Offbeat
One quiet move instead of a claim on the centre
Study opening - ECO A001.b4Tabiya: 3.Bxe527 lines
Polish Opening
- Flank openings
- Fianchetto
- Offbeat
The Orangutan strolls down the queenside
Study opening - ECO A001.c3Tabiya: 4.e31 lines
Saragossa Opening
- Flank openings
- Offbeat
A quiet pawn that waits for d4
Study opening - ECO A001.Na3Tabiya: 3.e44 lines
Sodium Attack
- Flank openings
- Offbeat
A chemist's joke on the edge of the board
Study opening - ECO A002.Nd2Tabiya: 6…O-O1 lines
Valencia Opening
- Flank openings
- Offbeat
A quiet d3 and a knight on d2
Study opening - ECO A001.Nc3Tabiya: 4.Ng333 lines
Van Geet Opening
- Flank openings
- Offbeat
Knight on the left: White starts from the wing
Study opening - ECO A001.e3Tabiya: 4.Nf35 lines
Van't Kruijs Opening
- Flank openings
- Offbeat
A quiet move that can become anything
Study opening - ECO A001.a4Tabiya: 3…Nc67 lines
Ware Opening
- Flank openings
- Offbeat
A first move from the edge of the board
Study opening - ECO A011.b3Tabiya: 4.Bb518 lines
Nimzo-Larsen Attack
- Flank openings
- Fianchetto
- Hypermodern
The bishop looks over the pawn
Study opening - ECO A041.Nf3Tabiya: 5…O-O47 lines
Zukertort Opening
- Flank openings
- Positional play
The move that promises nothing and keeps everything open
Study opening