The Chekhover Variation is a simple approach to attach the Sicilian Defense by capturing the d4 pawn with the queen instead of the common Nxd4. The move order starts with:
1. e4 c5
2. Nf3 d6
3. d4 cxd4
4. Qxd4
For more Sicilian Defense variations check out https://www.thechesswebsite.com/sicilian-defense/
PGN of moves:
1. e4 c5 2. Nf3 d6 (2… Nc6)(2… e6) 3. d4 cxd4 4. Qxd4 (4. Nxd4) 4… Nc6
(4… a6 5. Bc4 Nc6 6. Qd3 Nf6 7. O-O b5 8. Bb3 e5 9. Ng5) (4… Bd7 5. Nc3 Nc6
6. Qd3 (6. Bb5 Nxd4)6… Nf6 7. Bg5 e6 8. O-O-O)(4… Nf6) 5. Bb5 (5. Qa4) 5…
Bd7 (5… a6 6. Bxc6+ bxc6 7. O-O e5 8. Qd3 Nf6 9. Rd1 h6 10. Nxe5 dxe5 (10…
Qc7 11. Nc4)11. Qxd8#) 6. Bxc6 Bxc6 7. Nc3 Nf6 (7… e5 8. Qd3 Be7 9. O-O Nf6
10. Bg5) 8. Bg5 e6 (8… e5 9. Qd3 Be7 10. Bxf6 Bxf6 11. O-O-O O-O (11… Be7
12. Nd2)12. Qxd6 Qxd6 (12… Qb6 13. Nd5 Bxd5 14. Qxb6 axb6 15. Rxd5 Rxa2 16.
Rhd1 Ra4 17. Nxe5 Rxe4 18. Nd7 Rfe8 19. Nxf6+ (19. Nxb6 Rb4)19… gxf6 20.
b3)13. Rxd6) 9. O-O-O Be7 (9… a6 10. e5 dxe5 11. Qxe5 Qe7 12. Nd4 h6 13. Nxc6
bxc6 14. Ne4 hxg5 (14… Ng4 15. Qc3 Qb7 16. Bh4)15. Nd6+ Qxd6 (15… Kd8 16.
Nxf7+ Ke8 17. Nd6+ Kd8 18. Qa5+ Kd7 19. Nf5+)16. Rxd6) 10. Rhe1 O-O *