Modern Defense

Free, unlimited analysis for every Modern Defense game you play on Chess.com or Lichess. Our opening book holds 825 catalogued positions for this family under ECO A04–D05.

Analyse your own Modern Defense games, free

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Across a batch of games, the Profile Report scores your opening repertoire as one of six skills, benchmarked against players at your rating, so you can tell whether the Modern Defense is earning its place in your repertoire or quietly costing you points. Insights then shows your record with it by colour across your whole history.

Named variations of the Modern Defense

Our opening book catalogues 74 named variations in this family. Here they all are:

• Austrian Grand Prix Variation
• Averbakh Variation
• Averbakh, Kotov Variation
• Averbakh, Pterodactyl Defense
• Averbakh, Randspringer Variation
• Bishop Attack
• Bishop Attack, Monkey's Bum Variation
• Bishop, Bücker Gambit
• Colle System
• Colle, Siroccopteryx Variation
• Dunworthy Variation
• Fianchetto Gambit
• Geller System
• Gurgenidze Variation
• Lefong Gambit
• Lefong Gambit Accepted
• Lefong Gambit Declined
• Lizard Defense, Pirc-Diemer Gambit
• Masur Gambit
• Mongredien Defense
• Neo-Modern Defense
• Norwegian Rat
• Norwegian Rat, Norwegian Gambit
• Pterodactyl Defense
• Pterodactyl Defense with 2.Nf3 and 3.g3
• Pterodactyl Defense with 2.d4 and 3.g3
• Pterodactyl Defense with 3.Bf4
• Pterodactyl Defense with 3.c4
• Pterodactyl, Beefeater Variation
• Pterodactyl, Benoni Gambit Accepted
• Pterodactyl, Benoni Gambit Accepted, Beefeater Variation
• Pterodactyl, Central Anhanguera Variation
• Pterodactyl, Central Benoni Variation
• Pterodactyl, Central Benoni, Quetzalcoatlus Variation
• Pterodactyl, Central Bogolubovia Variation
• Pterodactyl, Central Quetzalcoatlus Gambit
• Pterodactyl, London System
• Pterodactyl, Queen Benoni Variation
• Pterodactyl, Queen Pteranodon Variation
• Pterodactyl, Quiet Line
• Pterodactyl, Rhamphorhynchus Variation
• Pterodactyl, Semi-Averbakh Variation
• Pterodactyl, Semi-Averbakh, Polish Variation
• Queen Pterodactyl Formation
• Rat Defense, Accelerated Gurgenidze Variation
• Rhamphorhynchus Variation
• Standard Line
• Standard, Anti-Modern Variation
• Standard, Lizard Defense, Mittenberger Gambit
• Standard, Mongredien Defense
• Standard, Pseudo-Austrian Attack
• Standard, Pterodactyl Defense
• Standard, Pterodactyl, Anhanguera Variation
• Standard, Pterodactyl, Benoni Gambit
• Standard, Pterodactyl, Eastern Variation, Benoni Variation
• Standard, Pterodactyl, Eastern Variation, Rhamphorhynchus Variation
• Standard, Pterodactyl, Eastern, Benoni Variation, Pteranodon Variation
• Standard, Pterodactyl, Eastern, Rhamphorhynchus, Pteranodon Variation
• Standard, Pterodactyl, Sicilian Variation, Anhanguera Variation
• Standard, Pterodactyl, Sicilian Variation, Quetzalcoatlus Variation
• Standard, Pterodactyl, Sicilian Variation, Rhamphorhynchus Variation
• Standard, Pterodactyl, Sicilian Variation, Siroccopteryx Variation
• Standard, Pterodactyl, Unpin
• Standard, Two Knights Variation
• Standard, Two Knights, Small Center Variation
• Standard, Two Knights, Suttles Variation
• Standard, Two Knights, Suttles, Tal Gambit
• Three Pawns Attack
• Three Pawns Attack with 2.f4
• Three Pawns, Pterodactyl Defense
• Three Pawns, Pterodactyl, Austrian Austriadactylus Western Variation
• Three Pawns, Pterodactyl, Austrian Pteranodon Variation
• Westermann Gambit
• Wind Gambit

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