1. d4 g6 The Modern Defense, allows white to take the centre and will attempt to break it down later. Looks similar to the Kings Indian defence ( Nf6 ) exccept that g6 allows white to play e4
2. e4 Bg7 3. c3 c6 4. Be3 d5 5. Nd2 The pawns nnow lock of the queenside, and will keep it that way for a while. So the idea here is to congregate on the kingside. The piece furthest from the kingside is the queens knight ( the queens rook can move fast once the way is clear ) . The knight move brings also protects e4. Also looking nice were e5 trying to clamp down on the kingside or Bd3 protecting the pawn and pointing at h7
Nd7 A similar idea to white, except that this move blocks in one bishop, and the king knight will have to exit hia h6 to avoid blocking f6 for the queens knight
6. Bd3 e5 probably works better here 6... dxe4 7. Nxe4 Not Bxe4 because the Bishop would be pointing at two pawn blockades
Ngf6 8. Nf3 Here I thought I had centralised my minor pieces nicely, but black attempts to show that this is not the case
Nxe4 9. Bxe4 Nf6 10. Bc2 Ng4 Black wants the two bishops
11. O-O But white puts a price on this. For the exchange white would get centre pawns and a half-open file for his rook
Nxe3 12. fxe3 O-O 13. Qd2 h6 14. e4 With this white now holds the centre, but needs to organise the pieces
Be6 15. Rf2 White wants to support e4 as much as possible since it has no pawn support ( and cannot have pawn support from the right hand side ) . To protect the e4 pawn ideally e3,e2,e1 will be populated by the rooks and queen, with the bishop and knight also able to contribute if required. Rfe1 would have left the rook on the back rank, playing Rf2 allows it to support the pawn bases on both sides, which will allow the queen to move more freely
Bc4 16. Bd3 White is happy to trade off a bishop negating blacks two bishop advantage.
Bxd3 17. Qxd3 e5 18. Rd1 White would be happy with e5xd4 since d4 is supported by c3, so continues with centralisation
exd4 19. cxd4 The interesting part is reached. We have mobile centre pawns vs flank majorities. White has more pawn islands, which is usually a bad thing, but the central control should allow simultaneous support of the central pawns and defence of both flanks. Black has the advantage of bishop against knight, but this will only be useful if the endgame is reached and black still has pawns on both flanks ( i.e. the bishop can reach both sides quicker than the knight )
Qb6 Black needs to stop the d & e pawns somehow. black can bring 4 pieces to bear on d4, but only 3 on e4 ( due to the bishop ) ,so makes that the point of attack. White however can defend either pawn with four pieces. Note that the d-pawn is now pinned, as b2 is guarded by Rf2, but attacked by vlacks queen and bishop. Also note that white has a major piece on each rank ( 1,2,3 ) so can quickly shuffle the major pieces to support either pawn, whereas black still has two rooks on the back rank, so would need to use a move to bring one forward if he wants to make a concentrated attack.
20. Re2 protecting the e pawn a second time. Note that this move pins d4 to the king
Rad8 21. Kh1 The d4 pawn is attacked 3 times and protected 3 times so is safe for at least the two moves that it would take for the final rook to join the attack. This move ( half ) unpins the pawn.
Rd7 22. b3 This move completely unpins d4
Rfd8 d4 is now attacked 4 times and only protected 3 times
23. e5 d5 would turn out bad because the white queen is in front of the white rook, she doesn't want to be the first piece in a sequence to be captured! ( Hopefully this is obvious, since Rd2 fails for the same reason even though there are four attackers and defenders ) e5 blocks blacks ideal first attacker of a sequence, and leaves d4 protected three times and attacked three times. The bishop cannot sacrifics on e5 because of Rxe5 ( not Nxe5 whice leaves d4 underprotected )
Rd5 Immobilising d4
24. e6 Here I considered Qc4 and Qe4 but they both seemed to be even. e6 introduces interesting tactical complications. Black will now have a very loose king regardless of what happens, and blacks queen is far away. For example fxe6 Qxg6 ( d4 is safe because the bishop is pinned ) and white probably picks up the e pawn.
f5 The d4 pawn is now in trouble again
25. e7 pulls one rook off the d file
Re8 26. Qe3 Re8 is hanging. Threatens Q->e6->f7xe8
Qc7 Trying to get rid of e7
27. Qe6+ Kh7 28. Qf7 Threatening the rook. It can't take e7 since Rxe7->mate
Qd7 protects the rook
29. Re6 Threatens Rxg6,Qxg6,Ne5 etc.
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