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Chess Atlas Codex

Codex of Opening Systems

All 126 opening families in one catalogue: search by name, move or player, and filter by the kind of position.

126families

Type

First move

Played with

Has a study9

11 families

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 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 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 A401…b6Tabiya: 6…Nf67 lines
English Defense
- Semi-closed games
- Fianchetto
- Hypermodern
Let them build the centre; we will undermine it
Study opening
ECO A411 lines
Robatsch Defense
- Semi-closed games
- Fianchetto
- Hypermodern
Study opening
ECO A451…Nf6Tabiya: 5…O-O53 lines
Indian Defense
- Semi-closed games
- Hypermodern
Let them build a centre; we shall deal with it later
Study opening
ECO A472…b6Tabiya: 3…e62 lines
Pseudo Queen's Indian Defense
- Semi-closed games
- Fianchetto
- Hypermodern
A Queen's Indian with the moves swapped
Study opening
ECO A482…g6Tabiya: 5…d61 lines
East Indian Defense
- Semi-closed games
- Fianchetto
- Hypermodern
The King's Indian, minus the c4 for now
Study opening
ECO A502…b6Tabiya: 4…e61 lines
Queen's Indian Accelerated
- Semi-closed games
- Fianchetto
- Hypermodern
The bishop's diagonal first, the e6 pawn later
Study opening
ECO D7016 lines
Neo-Grünfeld Defense
- Semi-closed games
- Fianchetto
- Hypermodern
Study opening