▁was ▁played ▁frequently ▁by ▁Henry ▁Bird ▁that ▁de cade , ▁then ▁received ▁general ▁accept ance ▁around ▁ 1 9 0 0 . ▁In ▁ch ess , ▁the ▁Dragon ▁Vari ation ▁is ▁one ▁of ▁the ▁main ▁lines ▁of ▁the ▁Sic ilian ▁Def ence ▁and ▁begins ▁with ▁the ▁moves : ▁▁ 1 . e 4 ▁c 5 ▁ 2 . N f 3 ▁d 6 ▁ 3 . d 4 ▁cx d 4 ▁ 4 . N x d 4 ▁N f 6 ▁ 5 . N c 3 ▁g 6 ▁ ▁In ▁the ▁Dragon , ▁Black ▁f ian ch etto es ▁his ▁bishop ▁on ▁the ▁h 8 – a 1 ▁diagonal . ▁The ▁line ▁is ▁one ▁of ▁the ▁ ▁variations ▁of ▁the ▁Sic ilian ▁Def ence , ▁making ▁it ▁one ▁of ▁the ▁sharp est ▁of ▁all ▁ch ess ▁open ings . ▁ ▁Sic ilian ▁Def ence , ▁Paul sen ▁Vari ation ▁ ▁A ▁less ▁famous ▁variation ▁in ▁the ▁Sic ilian ▁Def ence ▁is ▁the ▁Paul sen ▁Vari ation . ▁The ▁line ▁goes ▁as ▁follows : ▁▁ 1 . e 4 ▁c 5 ▁ 2 . N f 3 ▁e 6 ▁ 3 . d 4 ▁cx d 4 ▁ 4 . N x d 4 ▁a 6 ▁or ▁▁ 1 . e 4 ▁c 5 ▁ 2 . N f 3 ▁e 6 ▁ 3 . d 4 ▁cx d 4 ▁ 4 . N x d 4 ▁N c 6 ▁ 5 . N c 3 ▁a 6 ▁ ▁Paul sen ▁Att ack