1. d4 d5 2. b4 A strange second move for a Queens pawn opening. It Threatens to claim or at least lock down the queenside early, and doesn't have any immediate way to break it down. Stops c5 and makes nc3 unstable. The downside to it is that it creates holes on c4 and c3 ( which I didn't manage to exploit ) and could require early c3 making the queen knight and harder to usefully develop ( Bb2 or Ba3 makes the bishop bad, and the bishop would need to develop before the knight or wait
Bf5 Rather than assault the pawn queenside blockade directly, just let it form, and ensure that the queenside pieces get to the kingside ( greater mobility )
3. c3 Nf6 Normal development. Any queenside pawn moves would just help white lock up the queenside. The only one I considered for long was a5, but b5 keeps the situation locked
4. h3 Nbd7 Again trying to get the queenside pieces avaiable on the kingside, but this move also supports e5 or outposting the knight on c4 via b6
5. Nf3 Prevents e5
e6 Open the way for blacks last minor piece
6. Bg5 The pin is weak since the pinned Knight is protected by the other knight and white has no way of putting any pressure on the pinned knight
h6 Wanting to put knights on both e4 and c4 the pin needs to be removed. Also makes room for blacks light bishop is attacked. Also black has not yet decided whether to castle and which side. The black bishop will be gone before any kingside castle, reducing the ability of white to sac on h6
7. Bh4 Be7 The pin remained so trade off black bishops. Not g5 where black could sac the knight for two pawns gaining a passwed pawn and keeping blacks king either in the centre or castled underneath whites quenside pawns
8. e3 Ne4 Put the knight in a temporary hole and attacks the bishop
9. Bxe7 The bishop can't be saved without weakening the kingside ( g3 )
Qxe7 Develops the queen. All blacks minor pieces are now developed, and only one of whites
10. Bd3 O-O Whites dark bishop is gone and white would have a hard time making something on the king side
11. Nbd2 Attacking e4 and bringing a large number of tactical messes. The key flaw here is that c3 is hanging and that taking it attacks the queen
b6 Planning c5 to break up the central pawns
12. Ne5 Nxc3 Finally realised it was hanging. But still the wrong move order could leave black down
13. Qc2 Nxe5 14. dxe5 White now can't take QxNc3 since NxBd3 leaves black up a piece. If BxBf5 then Qxb4 dxe5 exf5 Qxf5 Ne4 and the knight is lost
Qxb4 15. Bxf5 exf5 16. O-O Ne2+ Here I was concerned that the black knight is hard to extract and the quee n is tied up defending it e.g. a3 ( Qa5 or Qc5 ) Nb3 where the queen is chased away from the knight. Ne4 is not so good for black because it makes b1 avaiable for a white rook and exposes a black pawn hanging at c7 ( although the hanging pawn may be poisoned? )
17. Kh1 c5 Strong protected passed pawns
18. Rab1 Threatening to drive the queen away
Qc3 The only place for the queen if she wants to make something out of the knight
19. Qxc3 Expected Qd1 where saving the knight becomes hard
Nxc3 20. Rb2 Ne4 21. Nxe4 dxe4 White can get the open file because he ha s one of the rooks off the back rank, but black is happy to trade down a rook and support the strong pawn structure
22. Rd1 Rad8 23. Rbd2 Rxd2 24. Rxd2 Rc8 ! There are a number of choices that could be made here but the quickest win is to support and push the passed pawn. White can't attack a7 because the passed pawn is too far ahead and whites a2 blocks the rooks return. Black could have guarded the pawn base here and turtled to a win, or could have gone to e8 to take e5, but the pawn is immobile anyway
25. Rd7 c4 26. Rd2 c3 27. Rc2 b5 28. a3 a5 29. Kg1 b4 30. axb4 axb4 31. Kf1 b3 0-1