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Openings
- Chess Atlas Subsections
- VOL. I • Chess HistoryFrom Chaturanga to Neural Engines
- VOL. II • Classic ChessPieces, Notation & Rules
- VOL. III • Legendary PlayersPantheon of Chess Immortals
- VOL. IV • Great GamesInteractive game studies
- VOL. V • OpeningsOriginal CAISSORA Opening Articles
- VOL. VI • Tactics & StrategyForks, Pins & Board Geometry
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
Key set-ups
8 families
ECO A801…f5Tabiya: 6…d669 linesDutch Defense
- Semi-closed games
- Fianchetto
- Sharp play
- Closed centre
One pawn step, and e4 is in the fist
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 A424…Qa5+Tabiya: 5…d633 lines
Pterodactyl Defense
- Semi-closed games
- Fianchetto
- Offbeat
Queen to a5, bishop to g7: Black aims at the dark squares
Study opening - ECO A474…c5Tabiya: 6.Nxd42 lines
Marienbad System
- Semi-closed games
- Fianchetto
- Set-up systems
A Queen's Indian set-up with …c5 thrown in early
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