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
22 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 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 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 D434…e6Tabiya: 9…c570 lines
Semi-Slav Defense
- Closed games
- Sharp play
The bishop is shut in, but not for long
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 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 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 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 A021.f4Tabiya: 7…Nbd728 lines
Bird Opening
- Flank openings
- Sharp play
The Dutch with an extra move
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.g4Tabiya: 3…c620 lines
Grob Opening
- Flank openings
- Sharp play
- Offbeat
The move that gets no forgiveness
Study opening - ECO A401…e5Tabiya: 6.Nc316 lines
Englund Gambit
- Semi-closed games
- Gambits
- Sharp play
A pawn on credit, the queen on a raid
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 C2515 lines
Vienna Gambit
- Open games
- Gambits
- Sharp play
Study opening - ECO C402…d5Tabiya: 4…Nf64 lines
Elephant Gambit
- Open games
- Gambits
- Sharp play
- Open centre
A big bite with nothing behind it
Study opening - ECO C402…f5Tabiya: 6…Qg626 lines
Latvian Gambit
- Open games
- Gambits
- Sharp play
A King's Gambit in reverse, and a move late
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 D004.f3Tabiya: 5…c649 lines
Blackmar-Diemer Gambit
- Closed games
- Gambits
- Sharp play
- Big pawn centre
A pawn for time and an open f-file
Study opening - ECO D013.Bf4Tabiya: 4…Na64 lines
Rapport-Jobava System
- Closed games
- Sharp play
- Set-up systems
A London with a knight eyeing c7
Study opening - ECO D323…c5Tabiya: 7…Be727 lines
Tarrasch Defense
- Closed games
- Sharp play
- Isolated pawn
A weak pawn for free pieces
Study opening - ECO E104…b5Tabiya: 6…d54 lines
Blumenfeld Countergambit
- Semi-closed games
- Gambits
- Sharp play
A wing pawn for the centre
Study opening