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.
Key set-ups
55 families
ECO C60Article3.Bb5Tabiya: 9.h3235 linesRuy 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 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 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 C443.d4Tabiya: 8…Nb653 lines
Scotch Game
- Open games
- Big pawn centre
- Open centre
- Classical
The centre opens on move three
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 C252.Nc3Tabiya: 5…Be741 lines
Vienna Game
- Open games
- Classical
Knight on c3, f-pawn at the ready
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 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 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.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 - ECO A072.g3Tabiya: 7…Nc627 lines
King's Indian Attack
- Flank openings
- Fianchetto
- Set-up systems
The King's Indian Defence, played by White with a tempo in hand
Study opening - ECO A152.b4Tabiya: 2.b42 lines
English Orangutan
- Flank openings
- Offbeat
An English that hurries to the wing
Study opening - ECO A401.d4Tabiya: 7…Nc682 lines
Queen's Pawn Game
- Closed games
One move, many roads
Study opening - ECO A415…Be7Tabiya: 7…c614 lines
Old Indian Defense
- Semi-closed games
- Solid
An Indian defence where the bishop stays at home
Study opening - ECO A452.b3Tabiya: 4…c51 lines
Basque Opening
- Semi-closed games
- Offbeat
A bishop on b2 with its own d4 pawn in the way
Study opening - ECO A452.f4Tabiya: 4…c51 lines
Canard Opening
- Semi-closed games
- Offbeat
The f4 pawn against the f6 knight: a Dutch-style set-up with White
Study opening - ECO A452.f3Tabiya: 5.Nxf31 lines
Paleface Attack
- Semi-closed games
- Offbeat
A pawn that takes a square from its own knight
Study opening - ECO A452.Bg5Tabiya: 4…c510 lines
Trompowsky Attack
- Semi-closed games
- Set-up systems
The bishop is out before you have opened your theory book
Study opening - ECO A463.e3Tabiya: 6.Ne51 lines
Yusupov-Rubinstein System
- Closed games
- Set-up systems
A quiet set-up: e3, Bd3 and a knight on e5
Study opening - ECO B001.e4Tabiya: 5…Be738 lines
King's Pawn Game
- Open games
- Classical
The first move that opens most of the book
Study opening - ECO C202.Ke2Tabiya: 3…d51 lines
Bongcloud Attack
- Open games
- Offbeat
The king goes for a walk on move two
Study opening - ECO C203.Qxd4Tabiya: 7…Re819 lines
Center Game
- Open games
- Open centre
- Classical
The queen comes out early, and the fight begins
Study opening - ECO C202.b3Tabiya: 4…Nf63 lines
King's Pawn Opening
- Open games
- Offbeat
A long-diagonal bishop that finds e5 well guarded
Study opening - ECO C202.Bb5Tabiya: 4.Nc33 lines
Portuguese Opening
- Open games
- Offbeat
A Ruy Lopez with the knight left at home
Study opening - ECO C213.c3Tabiya: 5…d58 lines
Danish Gambit
- Open games
- Gambits
- Sharp play
- Open centre
Two pawns for two bishops on open diagonals
Study opening - ECO C232.Bc4Tabiya: 5.Bb341 lines
Bishop's Opening
- Open games
- Open centre
- Classical
The bishop eyes f7 and the f-pawn stays free
Study opening - ECO C402.Nf3Tabiya: 5…Be73 lines
King's Knight Opening
- Open games
- Classical
The most natural second move
Study opening - ECO C443.Nxe5Tabiya: 4…Ng61 lines
Irish Gambit
- Open games
- Gambits
- Sharp play
- Open centre
A knight for a pawn and a hope for the centre
Study opening - ECO C443.c3Tabiya: 6…Qxd516 lines
Ponziani Opening
- Open games
- Classical
A pawn on c3 for the sake of d4
Study opening - ECO C463.Nc3Tabiya: 6…Nf66 lines
Three Knights Opening
- Open games
- Classical
- Symmetry
The fourth knight stays at home
Study opening