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The Alekhine's defence (1.e4 Nf6) is also a great attacking weapon for black, as it is a highly aggressive and provocative opening that lures white into overextending its centre, which can then be targeted (generally) via the knights on c6 and b6, trading the knight on f3 for your light square bishop, and sometimes even castling on the queen side to really target white's d pawn. Take a look at the opening moves in the most common variations (Modern, Albert, Carlsen, 4 pawns, etc) and see if you like the resulting positions for black. It is a good practical weapon in tournament play, and white is frequently caught off-guard, as it is a rare opening (however, many world champions have played it (Fischer, Spassky, Tal, Capablanca, Alekhine, Euwe etc. and it is still sometimes used at the highest level today by Carlsen, Shabalov, Kamsky etc.)