ECO Codes
Some of the systems employed by White against the Pirc Defence include the following:
- 4.Bc4 (ECO code B07) Kholmov System (4.Bc4 Bg7 5.Qe2)
- 4.Be2 (ECO code B07) sub-variants after 4..Be2 Bg7 include the Chinese Variation, 5.g4 and the Bayonet (Mariotti) Attack, 5.h4
- 4.Be3 (ECO code B07) 150 or "Caveman" Attack (4.Be3 c6 5.Qd2)
- 4.Bg5 (ECO code B07) Byrne Variation
- 4.g3 (ECO code B07) Sveshnikov System
- 4.Nf3 (ECO code B08) Classical (Two Knights) System (sub-variants after 4...Bg7 include 5.h3 and 5.Be2)
- 4.f4 (ECO code B09) Austrian Attack (sub-variants after 4.f4 Bg7 5.Nf3 0-0 include 6.e5, 6.Be2, 6.Bd3 and 6.Be3; also, after 4...Bg7 is 5.Bc4, the Ljubojevic Variation; Black also has the option to move into the Dragon Formation after 5.Nf3 with 5...c5)
Read more about this topic: Pirc Defence
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