Free · No signup · 118 lessons Chessy the knight

Chessy the knight

Learn any opening by
actually playing it

Drill 3604 chess lessons — openings, gambits, traps & tactics — against an adaptive Stockfish engine. Real win rates from 100M+ Lichess games. Honest verdicts, no fluff.

♟ Create free account Browse 3604 lessons ↓

📚 3604 free lessons

📊 Grounded in 100M+ Lichess games

⚙️ Honest Stockfish verdicts

🎯 Play every position vs adaptive engine

🆓 No signup required to browse

⭐ Featured lessons

Most popular

Openings & Plans

Sicilian Defense

Tactics & Checkmates

Must-know pattern

Openings & Plans

📚 Browse by opening family

Complete guides

Sicilian Defense 315 lessons English Opening 210 lessons French Defense 182 lessons Queen's Pawn Game 155 lessons Queen's Gambit 143 lessons King's Gambit 127 lessons Chess Terms & Questions 117 lessons King's Pawn Game 113 lessons Zukertort Opening 110 lessons Caro-Kann Defense 99 lessons Indian Defense 96 lessons Scandinavian Defense 87 lessons Vienna Game 80 lessons Nimzowitsch Defense 79 lessons Ruy Lopez 70 lessons Italian Game 68 lessons Dutch Defense 56 lessons Bishop's Opening 54 lessons Modern Defense 53 lessons Englund Gambit 50 lessons Alekhine Defense 49 lessons Polish Opening 48 lessons Benoni Defense 45 lessons Bird's Opening 45 lessons Petrov's Defense 40 lessons Van Geet Opening 37 lessons Hungarian Opening 36 lessons Grob Opening 33 lessons Nimzo-Larsen Attack 31 lessons Center Game 29 lessons Rat Defense 28 lessons King's Indian Defense 26 lessons Scotch Game 25 lessons Philidor Defense 24 lessons Slav Defense 23 lessons Réti Opening 22 lessons Checkmate Patterns 22 lessons Trompowsky Attack 21 lessons Pirc Defense 20 lessons King's Knight Opening 18 lessons Latvian Gambit 17 lessons Ponziani Opening 17 lessons Nimzo-Indian Defense 16 lessons Mieses Opening 16 lessons King's Indian Attack 16 lessons Blackmar-Diemer Gambit 16 lessons Chess Endgames 16 lessons Semi-Slav Defense 14 lessons Elephant Gambit 14 lessons Kádas Opening 13 lessons London System 13 lessons Owen Defense 13 lessons Old Indian Defense 12 lessons Grünfeld Defense 11 lessons Barnes Opening 11 lessons Ware Opening 11 lessons Pawn Structures 9 lessons Chess Tactics 8 lessons

Openings & Plans

Main lines · structural plans · key ideas

358 lessons

Accelerated Dragon

Accelerated Dragon: Bc4

Accelerated Dragon: Be3

Accelerated Dragon: Nc3

Accelerated Dragon: Nxc6

Accelerated Dragon: c3

Accelerated Dragon: c4

Amazon Attack: Siberian Attack

Anderssen's Opening

Anderssen's Opening: Nf6

Anderssen's Opening: c5

Anderssen's Opening: d5

Anderssen's Opening: e5

Anderssen's Opening: e6

Anderssen's Opening: g6

Australian Defense

Barnes Defense: Bc4

Barnes Defense: Nc3

Barnes Defense: Nf3

Barnes Defense: d4

Berlin Defense: Bxc6

Berlin Defense: Nc3

Berlin Defense: O-O

Berlin Defense: c3

Berlin Defense: d3

Berlin Defense: d4

Bogo-Indian Defense

Bongcloud Attack

Borg Defense: Bc4

Borg Defense: Nc3

Borg Defense: Nf3

Borg Defense: d4

Caro-Kann Advance

Caro-Kann Advance: Bf5

Caro-Kann Advance: a6

Caro-Kann Advance: c5

Caro-Kann Advance: e6

Caro-Kann Advance: f6

Caro-Kann Advance: g6

Carr Defense: Bc4

Carr Defense: Nf3

Carr Defense: d4

Catalan Opening

Catalan: Closed Defense

Catalan: Open Defense

Center Game Accepted

Center Game Accepted: Bc4

Center Game Accepted: Bd3

Center Game Accepted: Nf3

Center Game Accepted: Qxd4

Center Game Accepted: c3

Center Game Accepted: f4

Chigorin Defense

Chigorin Defense: Nc3

Chigorin Defense: Nf3

Chigorin Defense: c5

Chigorin Defense: cxd5

Chigorin Defense: e3

Clemenz Opening

Clemenz Opening: c5

Clemenz Opening: d5

Clemenz Opening: e5

Clemenz Opening: e6

Colle System: Bf5

Colle System: Bg4

Colle System: Nc6

Colle System: c5

Colle System: e6

Colle System: g6

Creepy Crawly Formation: Classical Defense

Czech Defense: Bc4

Czech Defense: Bd3

Czech Defense: Be3

Czech Defense: Bg5

Czech Defense: Nf3

Czech Defense: f4

East Indian Defense

East Indian Defense: Bf4

East Indian Defense: Bg5

East Indian Defense: Nc3

East Indian Defense: c4

East Indian Defense: e3

East Indian Defense: g3

English Defense

English Defense: Bf4

English Defense: Nc3

English Defense: Nf3

English Defense: c4

English Defense: e3

English Defense: e4

Four Knights Game

Four Knights Game: Bb5

Four Knights Game: Bc4

Four Knights Game: Nxe5

Four Knights Game: a3

Four Knights Game: d3

Four Knights Game: d4

French Advance: Bb4+

French Advance: Nc6

French Advance: Ne7

French Advance: a6

French Advance: c5

French Advance: f6

French Classical

French Classical: Bd3

French Classical: Bg5

French Classical: e5

French Classical: exd5

French Classical: f3

French Exchange

French Exchange: Nf6

French Exchange: Qxd5

French Exchange: exd5

Fried Fox Defense

Giuoco Pianissimo

Giuoco Pianissimo: Nf6

Giuoco Pianissimo: Nge7

Giuoco Pianissimo: Qf6

Giuoco Pianissimo: a6

Giuoco Pianissimo: d6

Giuoco Pianissimo: h6

Giuoco Piano: Nf6

Giuoco Piano: Nge7

Giuoco Piano: Qf6

Giuoco Piano: a6

Giuoco Piano: d6

Giuoco Piano: h6

Goldsmith Defense

Goldsmith Defense: Bc4

Goldsmith Defense: Nc3

Goldsmith Defense: Nf3

Goldsmith Defense: Picklepuss Defense

Goldsmith Defense: d4

Gunderam Defense

Gunderam Defense: Bc4

Gunderam Defense: Nc3

Gunderam Defense: d4

Hippopotamus Defense

Horwitz Defense

Horwitz Defense: Bf4

Horwitz Defense: Nc3

Horwitz Defense: Nf3

Horwitz Defense: c4

Horwitz Defense: e3

Horwitz Defense: e4

Kangaroo Defense

Kangaroo Defense: Keres Defense, Transpositional Variation

Lasker Simul Special

Lemming Defense

Lion Defense: Lion's Jaw

Mexican Defense

Mikenas Defense

Mikenas Defense: Bf4

Mikenas Defense: Cannstatter Variation

Mikenas Defense: Lithuanian Variation

Mikenas Defense: Nf3

Mikenas Defense: c4

Mikenas Defense: d5

Mikenas Defense: e3

Mikenas Defense: e4

Montevideo Defense

Neo-Grünfeld Defense: Goglidze Attack

Neo-Grünfeld Defense: with Nf3

Neo-Grünfeld Defense: with g3

Owen's Defense: Bc4

Owen's Defense: Nc3

Owen's Defense: Nf3

Owen's Defense: d3

Owen's Defense: d4

Owen's Defense: f4

Paleface Attack

Petrov Defense: Bc4

Petrov Defense: Nc3

Petrov Defense: Nxe5

Petrov Defense: c3

Petrov Defense: d3

Petrov Defense: d4

Polish Defense: Bf4

Polish Defense: Nf3

Polish Defense: c4

Polish Defense: e3

Polish Defense: e4

Portuguese Opening

Portuguese Opening: Bc5

Portuguese Opening: Nc6

Portuguese Opening: Nf6

Portuguese Opening: a6

Portuguese Opening: c6

Pseudo Queen's Indian Defense

Queen's Indian Accelerated

Queen's Indian Defense

Queen's Pawn, Mengarini Attack

Rapport-Jobava System

Rapport-Jobava System, with e6

Rapport-Jobava System, with e6: Bb4

Rapport-Jobava System, with e6: Bd6

Rapport-Jobava System, with e6: Nc6

Rapport-Jobava System, with e6: Nf6

Rapport-Jobava System, with e6: a6

Rapport-Jobava System, with e6: c5

Rapport-Jobava System: Bf5

Rapport-Jobava System: Nc6

Rapport-Jobava System: a6

Rapport-Jobava System: c5

Rapport-Jobava System: c6

Rapport-Jobava System: e6

Richter-Veresov Attack

Richter-Veresov Attack: Bf5

Richter-Veresov Attack: Boyce Defense

Richter-Veresov Attack: Nbd7

Richter-Veresov Attack: Nc6

Richter-Veresov Attack: c6

Richter-Veresov Attack: e6

Richter-Veresov Attack: h6

Rossolimo Variation

Rossolimo Variation: Nd4

Rossolimo Variation: Nf6

Rossolimo Variation: a6

Rossolimo Variation: d6

Rossolimo Variation: e6

Rossolimo Variation: g6

Saragossa Opening

Saragossa Opening: Nf6

Saragossa Opening: c5

Saragossa Opening: d5

Saragossa Opening: e5

Saragossa Opening: e6

Saragossa Opening: g6

Scandinavian Modern

Scandinavian Modern: Bb5+

Scandinavian Modern: Bc4

Scandinavian Modern: Nc3

Scandinavian Modern: Nf3

Scandinavian Modern: c4

Scandinavian Modern: d4

Semi-Tarrasch Defense

Semi-Tarrasch Defense: Bf4

Semi-Tarrasch Defense: Bg5

Semi-Tarrasch Defense: cxd5

Semi-Tarrasch Defense: dxc5

Semi-Tarrasch Defense: e3

Sicilian Classical

Sicilian Classical: Bb5

Sicilian Classical: Bc4

Sicilian Classical: Be2

Sicilian Classical: Be3

Sicilian Classical: Bg5

Sicilian Classical: Nxc6

Sicilian Dragon

Sicilian Dragon: Bc4

Sicilian Dragon: Bd3

Sicilian Dragon: Be2

Sicilian Dragon: Be3

Sicilian Dragon: Bg5

Sicilian Dragon: f3

Sicilian Kan: Bc4

Sicilian Kan: Bd3

Sicilian Kan: Be2

Sicilian Kan: Be3

Sicilian Kan: Nc3

Sicilian Kan: c4

Sicilian Najdorf

Sicilian Najdorf: Bc4

Sicilian Najdorf: Bd3

Sicilian Najdorf: Be2

Sicilian Najdorf: Be3

Sicilian Najdorf: Bg5

Sicilian Najdorf: f3

Sicilian Scheveningen

Sicilian Sveshnikov

Sicilian Taimanov

Sicilian Taimanov: Bb5

Sicilian Taimanov: Be3

Sicilian Taimanov: Nb5

Sicilian Taimanov: Nc3

Sicilian Taimanov: Nxc6

Sicilian Taimanov: c4

Sodium Attack: Chenoboskion Variation

St. George Defense

St. George Defense: Bc4

St. George Defense: Nc3

St. George Defense: Nf3

St. George Defense: d3

St. George Defense: d4

St. George Defense: f4

Stonewall Attack

Tarrasch Defense

Tarrasch Defense: Bf4

Tarrasch Defense: Nf3

Tarrasch Defense: cxd5

Tarrasch Defense: dxc5

Tarrasch Defense: e3

Three Knights Opening

Three Knights Opening: Bb4

Three Knights Opening: Bc5

Three Knights Opening: Nf6

Three Knights Opening: Steinitz Defense

Three Knights Opening: Winawer Defense

Three Knights Opening: a6

Three Knights Opening: d6

Three Knights Opening: h6

Torre Attack: Classical Defense

Torre Attack: Classical Defense, Nimzowitsch Variation

Torre Attack: Fianchetto Defense

Two Knights Defense

Two Knights Defense: Nc3

Two Knights Defense: Ng5

Two Knights Defense: O-O

Two Knights Defense: c3

Two Knights Defense: d3

Two Knights Defense: d4

Valencia Opening

Van't Kruijs Opening

Van't Kruijs Opening: Bouncing Bishop Variation

Van't Kruijs Opening: Nf6

Van't Kruijs Opening: c5

Van't Kruijs Opening: d5

Van't Kruijs Opening: e5

Van't Kruijs Opening: e6

Van't Kruijs Opening: g6

Vulture Defense

Ware Defense: Bc4

Ware Defense: Nc3

Ware Defense: Nf3

Ware Defense: Snagglepuss Defense

Ware Defense: d4

Yusupov-Rubinstein System

Yusupov-Rubinstein System: Bb4+

Yusupov-Rubinstein System: Be7

Yusupov-Rubinstein System: Nc6

Yusupov-Rubinstein System: b6

Yusupov-Rubinstein System: c5

Yusupov-Rubinstein System: d5

Gambits

Material sacrifices for rapid development

105 lessons

Amar Opening: Paris Gambit

Anderssen's Opening: Polish Gambit

Belgrade Gambit

Blackburne Shilling Gambit

Blackburne Shilling Gambit: Nc3

Blackburne Shilling Gambit: Nxd4

Blackburne Shilling Gambit: Nxe5

Blackburne Shilling Gambit: O-O

Blackburne Shilling Gambit: c3

Blackburne Shilling Gambit: d3

Borg Defense: Borg Gambit

Borg Defense: Troon Gambit

Borg Defense: Zilbermints Gambit

Budapest: Fajarowicz

Carr Defense: Zilbermints Gambit

Catalan Opening: Hungarian Gambit

Clemenz Opening: Spike Lee Gambit

Cochrane Gambit

Danish Gambit Accepted

Danish Gambit Accepted: Bc4

Danish Gambit Accepted: Nf3

Danish Gambit Accepted: Nxc3

Danish Gambit Accepted: Svenonius Defense

Danish Gambit Declined: Sörensen Defense

Danish Gambit: Nc6

Danish Gambit: Nf6

Danish Gambit: d3

Danish Gambit: d5

Danish Gambit: d6

Danish Gambit: dxc3

Duras Gambit: Nc3

Duras Gambit: Nf3

Duras Gambit: d3

Duras Gambit: e5

Duras Gambit: exf5

English Defense: Eastbourne Gambit

Evans Gambit: Bb6

Evans Gambit: Bxb4

Evans Gambit: Nxb4

Fajarowicz Gambit

Göring Gambit: Bc5

Göring Gambit: Nf6

Göring Gambit: d3

Göring Gambit: d5

Göring Gambit: d6

Göring Gambit: dxc3

Halloween Gambit

Horwitz Defense: Zilbermints Gambit

Latvian Gambit Accepted

Latvian Gambit Accepted: Bc5

Latvian Gambit Accepted: Nc6

Latvian Gambit Accepted: Nf6

Latvian Gambit Accepted: d6

Latvian Gambit Accepted: e4

Polish Defense: Spassky Gambit Accepted

Portuguese Opening: Miguel Gambit

Portuguese Opening: Portuguese Gambit

Rousseau Gambit

Rousseau Gambit: Bxg8

Rousseau Gambit: Nc3

Rousseau Gambit: d3

Rousseau Gambit: d4

Rousseau Gambit: exf5

Scotch Gambit: Bb4+

Scotch Gambit: Bc5

Scotch Gambit: Be7

Scotch Gambit: Nf6

Scotch Gambit: d6

Scotch Gambit: h6

Slav Indian: Kudischewitsch Gambit

Sodium Attack: Durkin Gambit

St. George Defense: Zilbermints Gambit

Stafford Gambit

Stafford Gambit: Bc4

Stafford Gambit: Nc3

Stafford Gambit: Qe2

Stafford Gambit: d3

Stafford Gambit: e5

Stafford Gambit: f3

Traxler Counterattack

Traxler Counterattack: Bxf7+

Traxler Counterattack: Nxf7

Traxler Counterattack: O-O

Vienna Gambit, with Max Lange Defense

Vienna Gambit, with Max Lange Defense: Bb4

Vienna Gambit, with Max Lange Defense: Bc5

Vienna Gambit, with Max Lange Defense: Nf6

Vienna Gambit, with Max Lange Defense: d6

Vienna Gambit, with Max Lange Defense: exf4

Vienna Gambit: Bb4

Vienna Gambit: Bc5

Vienna Gambit: Nc6

Vienna Gambit: d5

Vienna Gambit: d6

Vienna Gambit: exf4

Traps

Punish greedy or careless play

12 lessons

Blackburne Shilling Gambit Trap

Blackburne Shilling Gambit Trap: Qg5

Fried Liver Attack

Fried Liver Attack: Bxd5

Fried Liver Attack: Nxf7

Fried Liver Attack: Qf3

Fried Liver Attack: d3

Fried Liver Attack: d4

Stafford Gambit Trap