The Modern Defense: Geller's System is a chess opening classified under ECO code B07 in the Semi-Open Games family, where Black responds to 1.e4 with something other than 1...e5, including the Sicilian Defense, Caro-Kann, and Pirc. It is reached after 4 moves: 1. e4 g6 2. d4 Bg7 3. Nf3 d6 4. c3. The resulting position leaves black to move.
Resulting Position
1. e4 g6 2. d4 Bg7 3. Nf3 d6 4. c3
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