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Your repertoire

A repertoire for each colour: attack with White, answer 1.e4 and 1.d4 with openings your opponents rarely study. Every line is annotated move by move and checked with Stockfish. Active courses create your daily work; paused ones keep their progress and wait.

For White · ECO C21
Danish Gambit
Two pawns for the initiative. 7 chapters, 21 annotated lines, 3 traps.Puzzles from this opening →
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For Black · ECO B01
Scandinavian Defense
One answer to 1.e4. 5 chapters, 9 annotated lines, 2 traps.Puzzles from this opening →
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For Black · ECO A40
Hartlaub-Charlick Gambit
The Danish spirit against 1.d4. 4 chapters, 8 annotated lines, 1 trap.Puzzles from this opening →
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For White · ECO C44
Scotch Gambit
A pawn for development and an early strike at f7. 5 chapters, 13 annotated lines, 3 traps.Puzzles from this opening →
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For Black · ECO E60-E99
King's Indian Defense
Cede the centre, then storm the king. 7 chapters, 11 annotated lines.Puzzles from this opening →
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For White · ECO D02
London System
One setup, every opponent, and a bishop that gets out first. 5 chapters, 13 annotated lines, 1 trap.Puzzles from this opening →
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For Black · ECO B35
Accelerated Dragon
One tempo, and the Yugoslav Attack is gone. 5 chapters, 12 annotated lines, 3 traps.Puzzles from this opening →
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For White · ECO D35
Queen's Gambit
The oldest offer in chess, and the pawn comes back. 6 chapters, 16 annotated lines, 1 trap.Puzzles from this opening →
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For White · ECO C33
King's Gambit
A pawn, an open file, and a game your opponent has never studied. 5 chapters, 16 annotated lines, 2 traps.Puzzles from this opening →
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For White · ECO C50
Italian Game
The bishop points at f7 from move three. 7 chapters, 15 annotated lines, 1 trap.Puzzles from this opening →
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For Black · ECO B12
Caro-Kann Defence
Everything the French wants, without burying the bishop. 6 chapters, 15 annotated lines.Puzzles from this opening →
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Around three active openings is plenty. Paused courses keep their progress and stay browsable — they just stop creating daily work and never build up review debt.