1. e4 e5 2. Nc3 (2. d4 exd4 3. c3 (3. Qxd4 { [%cal Gc1d2,Gb1c3,Gd4e3,Ge1c1] } 3... Nc6 4. Qe3 Nf6 5. Bd2 (5. Nc3 Bb4 6. Bd2 O-O 7. O-O-O Re8 { [%csl Ge4] } 8. Bc4 (8. Qg3 Nxe4 9. Nxe4 Rxe4 10. c3 (10. Bg5) (10. Bf4 Qf6 11. Bxc7 (11. Nh3 d5 { [%cal Gc8h3,Gf6f4] } 12. Bxc7 Bf5 { [%cal Ga8c8] }) 11... d6 { [%csl Gc7] } 12. Bxd6 Bf5) (10. Bxb4 Rxb4 { [%cal Gd7d6,Gc8d7,Gd8f6] }) 10... Be7 { [%cal Gd7d5] }) (8. Qf4 { nepo tried this. recently a lot. } 8... Ne5 { [%csl Gg6][%cal Ge5g6] } 9. h4 (9. f3 c6 { open c file will be bad for white's king. } { [%cal Gd7d5,Ge5g6] }) 9... Ng6 10. Qh2 Nxe4 11. h5 Nf8 12. Nxe4 Rxe4 13. Bxb4 Rxb4) (8. Qf3) 8... d6 { [%cal Gf2f3,Gg2g4] } 9. Nf3 (9. f3 Ne5 10. Bb3 (10. Be2 c6 { [%cal Gd6d5] }) 10... c6 11. Nge2 b5 { [%cal Ga7a5,Ga5a4] }) 9... Be6) 5... Be7 6. Nc3 d5) 3... Qe7 { [%csl Ge4] } 4. Bd3 (4. Qxd4 Nc6 5. Qe3 Nf6 { [%cal Gd7d5] }) (4. Nd2 dxc3 5. bxc3 d5) (4. cxd4 Qxe4+ 5. Be3 Bb4+ 6. Nc3 Nf6) 4... d5 5. cxd4 dxe4 6. Bc2 f5 { [%cal Gb8c6,Gc8d7,Ge8c8] }) (2. c3 d5 3. exd5 Qxd5 { the better centre game. } { [%cal Gb1c3] }) (2. d3 Nf6 { [%cal Gd7d5] } 3. Nf3 (3. f4 exf4 4. Bxf4 Nc6 { we will play d5. } { [%cal Gd7d5] } 5. Nf3 (5. Be2 d5 6. e5 Nd7 7. d4 { e2 bishop is misplaced. would rather be on d3. } { [%csl Ge2,Gd3][%cal Ge2d3] } 7... f6 8. Nf3 fxe5 9. dxe5 Nc5 { [%cal Gf8e7,Ge8g8,Gc8e6] }) 5... d5 6. e5 Nh5 { this access to h4 was what we were waiting for. } { [%csl Gh5,Gf4] }) 3... Nc6 { reverse philidor. }) (2. Qh5 Nc6 3. Bc4 Qe7 4. Nc3 Nf6 5. Qd1 Qd8 { back in the bishop's opening. } { [%cal Gd1h5,Gh5d1,Gd8e7,Ge7d8] }) (2. c4 Nc6 { good control of the dark squares. } { [%cal Gf8c5,Gg8e7] }) (2. f4 { the special. one. } 2... d5! (2... exf4 3. Nf3 (3. Bc4) 3... d5) 3. exd5 (3. fxe5?? Qh4+ { white can resign. }) 3... exf4 4. Nf3 Nf6 { [%cal Gf6d5] } 5. Bc4 (5. d4 Nxd5 6. c4 (6. Bc4 Be6 7. O-O (7. Bxd5 Qxd5 8. Bxf4 (8. O-O Nc6 9. Bxf4 O-O-O { launch a kingside atta } { [%cal Gf7f6,Gg7g5,Gh7h5] }) 8... Qe4+) 7... Ne3 8. Bxe3 (8. Bb5+ c6 9. Bxe3 fxe3 { [%csl Gb5][%cal Gg7g6,Gf8h6,Ge8g8] }) 8... Bxc4 9. Bxf4 Bxf1 10. Kxf1 Be7) 6... Bb4+ { [%cal Gd5e3] }) (5. Nc3 Nxd5 6. Bc4 (6. Nxd5 Qxd5 7. d4 { [%cal Gd5e4,Ge4f4] } 7... Be7 8. Bd3 g5) 6... Nxc3 7. bxc3 (7. dxc3 Bd6 { [%cal Ge8g8] }) 7... Bd6 { [%cal Ge8g8] } 8. Qe2+ Qe7 9. Qxe7+ Kxe7) (5. Bb5+ c6 6. dxc6 Nxc6 7. O-O (7. d3) (7. d4 Bd6 { castle short and launch a kingside pawn storm. } { [%cal Ge8g8,Gh7h6,Gg7g5] }) (7. Nc3 Be6! (7... Bd6 8. Qe2+) 8. O-O Bd6 9. Ng5 O-O 10. Nxe6 fxe6 11. d4 g5) 7... Qb6+) (5. c4 c6 6. dxc6 (6. d4 Bb4+ 7. Nc3 cxd5 8. c5 (8. Bxf4 O-O 9. Bd3 (9. Be2 dxc4 10. Bxc4 Qe7+ 11. Ne5 (11. Be5 Nc6) (11. Qe2 Qxe2+ 12. Kxe2 Nc6) 11... Nc6) 9... Re8+ (9... dxc4 10. Bxc4)) (8. Bd3 { best move. } 8... dxc4 9. Bxc4 O-O (9... Qe7+ 10. Ne5) 10. O-O Bg4 11. Bxf4 Nc6 { this is the best white can get in this variation. }) 8... O-O { white is completely lost due to the bishops not on d7 but b4. active } { [%csl Gb4,Ge7][%cal Gf8e8,Gf6e4,Rb4e7] }) 6... Nxc6 { white is lost here. dark squares are weak and development is apparent. } { [%cal Gc8g4,Gf8c5] } 7. d4 Bg4 8. d5 (8. Be2 Bxf3 9. Bxf3 Qe7+ 10. Kf1 O-O-O 11. d5 Qc7 { demolished on the dark squares. } { [%cal Gc6e5,Gf8c5,Gh8e8] }) 8... Bb4+ 9. Nc3 Ne4) 5... Nxd5 6. O-O Be6 { castle queenside. } 7. Qe2 (7. Bb3 Nc6 { [%cal Gd8f6,Ge8c8] }) 7... Nc6 8. d4 Qd6 9. Nbd2 O-O-O 10. Ne4 Qd7 (10... Qe7 { [%cal Gg7g5,Gh7h6] })) (2. Bc4 { used as a trick against petroff. to get into the italian. } 2... Nf6 3. d3 Nc6 (3... c6 4. Nf3 d5 5. Bb3 a5 6. a4 Bb4+ 7. c3 Bd6 8. O-O O-O) 4. Nf3 (4. f4 exf4 5. Bxf4 (5. Nc3 Bb4 { [%cal Gd7d5] }) 5... d5 6. exd5 Nxd5 { white has moved his f pawn and is not close to castling. }) (4. Nc3 Na5 { if white ever touches a pawn you take. you don't wanna give white the d3 square for free } { [%csl Gc4][%cal Gd3c4,Gd1d3] } 5. Nf3 (5. Nge2 c6 6. a4 (6. O-O Bc5 7. a3 (7. Bb3 O-O { we don't take the bishop until it is threatening to escape. } { [%cal Gd7d5] }) (7. a4 Nxc4 8. dxc4 { transposes. }) 7... Nxc4 8. dxc4 d6 { [%cal Gc8e6,Ge8g8,Ga7a6,Gb7b5] }) 6... Nxc4 7. dxc4 Bc5 8. O-O O-O 9. Qd3 d6 10. Be3 Bxe3 11. Qxe3 Qb6 { imagine this position with white rook on d1 and pawn on a2. we would not be able to play Qb6. that is why we wait before taking on c4. } { [%cal Ga4a2,Gc8e6,Gf8d8] }) 5... Nxc4 { exception,. } 6. dxc4 Bb4)) 2... Nf6 3. g3 (3. d4 exd4 4. Qxd4 Nc6 5. Qe3) (3. f4 d5 { [%csl Gd5] } 4. exd5 (4. fxe5 Nxe4 5. Nf3 (5. Qf3 Nc6 6. Nxe4 (6. Bb5! Nxc3 { [%cal Gd8h4,Gh4e4] } 7. bxc3 (7. dxc3 Qh4+ 8. g3 Qe4+ 9. Qxe4 dxe4 { [%cal Gc8d7,Ge8c8,Gh7h5,Gh5h4] }) 7... Qh4+ 8. g3 Qe4+ 9. Qxe4 dxe4 { [%cal Gc8d7,Ge8c8,Gh7h5,Gh5h4,Gd2d4,Ge4d3] } 10. d4 exd3 11. cxd3 Bd7 12. d4 (12. Bxc6 Bxc6 { it's all over. }) 12... Nxe5) 6... Nd4 7. Qd3 dxe4 8. Qxe4 Bf5) 5... Bc5 6. d4 Bb4 7. Bd2 c5 { blow up the centre. }) 4... Nxd5 5. fxe5 (5. Nf3 exf4) 5... Nxc3 6. dxc3 (6. bxc3 Qh4+ 7. Ke2 Bg4+ 8. Nf3 Nc6 9. Qe1 Qh5 10. Kd1 { delayed transvestite } 10... Qxe5) 6... Qh4+ 7. Kd2 Qg5+ 8. Ke1 Qh4+ (8... Qxe5+ 9. Qe2 Qxe2+ { looks a lot like berlin endgame. but we haven't exchanged the dark squared bishop. } { [%csl Gc3,Gc2,Gb2,Ga2] }) 9. Kd2) (3. Bc4 Nc6 { transposes to the bishop's opening. } (3... Bb4 4. Nf3 Bxc3 5. dxc3 d6 6. Qe2 Nbd7)) 3... d5 { glek system, not a very good choice. } 4. exd5 Nxd5 5. Bg2 Nxc3 6. bxc3 Nc6 7. Ne2 (7. Nf3 Bd6 8. O-O O-O { not much sense in white's position. east equality. } { [%cal Gf8e8,Gc8f5] } 9. d4 (9. Rb1 Rb8 10. d3 (10. d4 Bf5 { [%cal Gf8e8] }) 10... Bf5 11. Nd2 (11. d4) 11... Qd7 { overprotect the e5 pawn. } { [%cal Gf8e8] }) 9... Bf5 { [%cal Gf8e8] }) 7... Be6 8. O-O Bd5 { [%csl Bf3][%cal Gd8d7,Ge8c8,Bh7h5,Bh5h4] }