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
126 families
ECO B073…Nbd7Tabiya: 6…c66 linesLion Defense
- Semi-open games
- Hypermodern
A Philidor that came in through the Pirc door
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 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…Qe7Tabiya: 4…d61 lines
Gunderam Defense
- Open games
- Offbeat
The queen guards the pawn and blocks the bishop
Study opening - ECO C402.Nf3Tabiya: 5…Be73 lines
King's Knight Opening
- Open games
- Classical
The most natural second move
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 C441 lines
Dresden Opening
- Open games
- Offbeat
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 - ECO D002.Qd3Tabiya: 3…c52 lines
Amazon Attack
- Closed games
- Offbeat
The queen out early, the bishop shut in
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 D013.Bg5Tabiya: 4.f38 lines
Richter-Veresov Attack
- Closed games
- Set-up systems
The bishop goes first, the c-pawn stays home
Study opening - ECO D055.b3Tabiya: 7…O-O6 lines
Rubinstein Opening
- Closed games
- Positional play
A Colle with the bishop rushing to b2
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 D7016 lines
Neo-Grünfeld Defense
- Semi-closed games
- Fianchetto
- Hypermodern
Study opening - ECO E104…b5Tabiya: 6…d54 lines
Blumenfeld Countergambit
- Semi-closed games
- Gambits
- Sharp play
A wing pawn for the centre
Study opening - ECO E113…Bb4+Tabiya: 7…Ne421 lines
Bogo-Indian Defense
- Semi-closed games
- Solid
A bishop check that sidesteps the big theory
Study opening - ECO E601 lines
Queen's Pawn
- Closed games
Study opening