Greetings to all chess fans! Aside from the minority attack, another middle game strategy I employ but to a lesser degree is the isolated queen's pawn. An isolated queen's pawn, also known as an isolani is a pawn sitting on the d file that has no friendly pawns on the adjacent c file or e file to support it. It's double edged. The side who has it has some advantage in space but it can become a weakness in the endgame. Since it cannot be supported by pawns, pieces must defend it so my strategy is to exchange pieces in the hope of taking the pawn later.
For example, in my game in lichess.org. After the moves 1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 dxc4 6. Bxc4 a6 7. Nf3 Nc6 8. Be3 e6 9. O-O Be7 10. Re1 O-O 11. h3 b5 12. Bb3 Nb4
After the opening moves, White has an isolated pawn on d4. My strategy was to prevent White from pushing it by defending the d5 square. At the same time, I will try to exchange some pieces to lessen its defenders. 13. a3 Nbd5 14. Nxd5 Nxd5 15. Qd3 Bb7
Knights were exchange and my bishop improved its position and has a nice diagonal targeting White's king side. 16. Bc2 Nf6 17. Bg5 g6
White is trying to launch an attack on my own king side but I have enough defense against it. 18. Ne5 Nd5 19. Bh6 Re8 20. Qf3 Bf6 21. Ng4 Bg7 22. Bxg7 Kxg7
Another piece got exchange and my queen and knight are defending White's invasion squares. 23. Qd3 Qg5 24. Re5 Qd8 25. Qd2 Nf6 26. Qh6+ Kg8
It looks like White has an attack after Nxf6 Qxf6 Rh5 but simply Qg7 defends the position. 27. Rae1 Nxg4 28. hxg4 Qxd4
Finally the pawn was captured and with a threat of a King side attack. 29. Qg5 Rac8 30. Bb1 Rc4
White will lose his g4 pawn, it's already a won game for Black. 31. R5e3 Qxg4 32. Qxg4 Rxg4 33. g3 Rd8 34. Rc3 Rgd4 35. Rc7 Ba8 36. Rec1 Rd1+ 37. Rxd1 Rxd1+ { White resigns. } 0-1
Game link: https://lichess.org/game/pDYHzTsJ/black#0